updated DisplayString for presheaves and their morphisms

[mohamed-barakat]

• installed PrintString for IsObject/MorphismInP(r)osetOfCategory
• installed ViewString for IsMorphismInP(r)osetOfCategory and HasUnderlyingCell
• replaced Display -> DisplayString for IsObjectInP(r)osetOfCategory
• replaced ViewObj -> ViewString for IsObjectInP(r)osetOfCategory

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 73.07692% with 14 lines in your changes are missing coverage. Please review.

Project coverage is 75.62%. Comparing base (9558ac9) to head (61fcd11).

Files	Patch %	Lines
Locales/gap/ProsetOfCategory.gi	70.83%	14 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #517 +/- ## ======================================= Coverage 75.62% 75.62% ======================================= Files 389 389 Lines 57884 57908 +24 ======================================= + Hits 43775 43795 +20 - Misses 14109 14113 +4 ``` | [Flag](https://app.codecov.io/gh/homalg-project/CategoricalTowers/pull/517/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | Coverage Δ | | |---|---|---| | [Algebroids](https://app.codecov.io/gh/homalg-project/CategoricalTowers/pull/517/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | `75.75% <ø> (ø)` | | | [CatReps](https://app.codecov.io/gh/homalg-project/CategoricalTowers/pull/517/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | `83.54% <ø> (ø)` | | | [CategoriesWithAmbientObjects](https://app.codecov.io/gh/homalg-project/CategoricalTowers/pull/517/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | `89.30% <ø> (ø)` | | | [ExteriorPowersCategories](https://app.codecov.io/gh/homalg-project/CategoricalTowers/pull/517/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | `43.70% <ø> (ø)` | | | [FiniteCocompletions](https://app.codecov.io/gh/homalg-project/CategoricalTowers/pull/517/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | `89.20% <ø> (ø)` | | | [FpCategories](https://app.codecov.io/gh/homalg-project/CategoricalTowers/pull/517/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | `86.95% <ø> (ø)` | | | [FunctorCategories](https://app.codecov.io/gh/homalg-project/CategoricalTowers/pull/517/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | `65.09% <100.00%> (ø)` | | | [GradedCategories](https://app.codecov.io/gh/homalg-project/CategoricalTowers/pull/517/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | `86.57% <ø> (ø)` | | | [InternalModules](https://app.codecov.io/gh/homalg-project/CategoricalTowers/pull/517/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | `81.66% <ø> (ø)` | | | [IntrinsicCategories](https://app.codecov.io/gh/homalg-project/CategoricalTowers/pull/517/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | `82.55% <ø> (ø)` | | | [IntrinsicGradedModules](https://app.codecov.io/gh/homalg-project/CategoricalTowers/pull/517/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | `50.83% <ø> (ø)` | | | [IntrinsicModules](https://app.codecov.io/gh/homalg-project/CategoricalTowers/pull/517/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | `82.15% <ø> (ø)` | | | [LazyCategories](https://app.codecov.io/gh/homalg-project/CategoricalTowers/pull/517/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | `68.12% <ø> (ø)` | | | [Locales](https://app.codecov.io/gh/homalg-project/CategoricalTowers/pull/517/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | `85.61% <71.42%> (-0.02%)` | :arrow_down: | | [PreSheaves](https://app.codecov.io/gh/homalg-project/CategoricalTowers/pull/517/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | `91.92% <ø> (ø)` | | | [QuotientCategories](https://app.codecov.io/gh/homalg-project/CategoricalTowers/pull/517/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | `92.08% <ø> (ø)` | | | [SubcategoriesForCAP](https://app.codecov.io/gh/homalg-project/CategoricalTowers/pull/517/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | `81.25% <ø> (ø)` | | | [ToolsForCategoricalTowers](https://app.codecov.io/gh/homalg-project/CategoricalTowers/pull/517/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | `84.93% <ø> (ø)` | | | [Toposes](https://app.codecov.io/gh/homalg-project/CategoricalTowers/pull/517/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | `90.73% <ø> (ø)` | | | [ZariskiFrames](https://app.codecov.io/gh/homalg-project/CategoricalTowers/pull/517/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project) | `74.31% <ø> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=homalg-project#carryforward-flags-in-the-pull-request-comment) to find out more.

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.