fix: correctly validate required TimePicker

[bitpshr]

Type: bug

The following has been addressed in the PR:

• [x] There is a related issue
• [x] All code matches the style guide
• [ ] Unit tests are included in the PR
• [x] For new widgets, an entry has been added to the .dojorc
• [x] For new widgets, theme.variant() is added to the root domnode
• [x] Any widget variant uses theme.compose like this
• [x] WidgetProperties are exported

Description:

This pull request fixes an issue with TimePicker that prevented required instances from failing validation.

Resolves #1714

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widget-test-docs – ./

🔍 Inspect: https://vercel.com/dojo/widget-test-docs/6eYDhPjwJBeJujeHg2xKwuwBLXar
✅ Preview: https://widget-test-do-git-fork-bitpshr-fix-time-picker-validat-2fb2f2.vercel.app

dojo.widgets – ./

🔍 Inspect: https://vercel.com/dojo/dojo.widgets/3mnjkR1Gi5wnCYQhCn4SxFj5ZaAh
✅ Preview: https://dojowidgets-git-fork-bitpshr-fix-time-picker-validate-dojo1.vercel.app

[codecov[bot]]

Codecov Report

Merging #1716 (1434215) into master (afc67b0) will increase coverage by 0.07%. The diff coverage is 66.66%.

@@            Coverage Diff             @@
##           master    #1716      +/-   ##
==========================================
+ Coverage   90.17%   90.24%   +0.07%     
==========================================
  Files          94       94              
  Lines        5088     5116      +28     
  Branches     1384     1392       +8     
==========================================
+ Hits         4588     4617      +29     
+ Misses        247      244       -3     
- Partials      253      255       +2     

Impacted Files	Coverage Δ
src/time-picker/index.tsx	82.41% <66.66%> (+0.59%)	:arrow_up:
src/date-input/date-utils.tsx	97.43% <0.00%> (-2.57%)	:arrow_down:
src/date-input/index.tsx	91.37% <0.00%> (+0.30%)	:arrow_up:
src/wizard/index.tsx	92.30% <0.00%> (+0.47%)	:arrow_up:
src/select/index.tsx	88.79% <0.00%> (+1.83%)	:arrow_up:

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[tomdye]

@bitpshr should this be showing as visibly valid, ie. green, when set to required and with a value passed? It appears that it currently does not. Also, it looks like the dojo themed time picker now shows as valid / green as soon as it is rendered even though it's not supposed to.

[bitpshr]

@tomdye: The Material TimePicker does not show any valid border in its valid state (and neither do any other inputs, like TextInput), so I think we're good there. The Dojo TimePicker always showed a green border when initially rendered with a valid value, that is not related to these changes. Also note that any other input that wraps TextInput (like NumberInput) also render with a valid border initially when they have a valid value, see https://widget-test-docs-lnbpjip2w-dojo1.vercel.app/#widget/number-input/example/validation for an example (using the Dojo theme.)

I think we are good on both issues for this specific fix.

[bitpshr]

@agubler test added that fails on master and passes here, made as simple as possible to show the issue. cc sir @tomdye when you have a chance to sign off.