[MM-48223] Improve styling of /apps list

[hanzei]

Summary

Before

After

Ticket Link

https://mattermost.atlassian.net/browse/MM-48223

[levb]

@mickmister no lists in tables, AFAIK :(

[hanzei]

@mickmister I could not get md lists working in tables.

[codecov-commenter]

Codecov Report

Base: 20.77% // Head: 20.71% // Decreases project coverage by -0.06% :warning:

Coverage data is based on head (a2994e3) compared to base (39ea6b1). Patch coverage: 22.58% of modified lines in pull request are covered.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #442 +/- ## ========================================== - Coverage 20.77% 20.71% -0.06% ========================================== Files 80 80 Lines 5348 5362 +14 ========================================== Hits 1111 1111 - Misses 4099 4113 +14 Partials 138 138 ``` | [Impacted Files](https://codecov.io/gh/mattermost/mattermost-plugin-apps/pull/442?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=mattermost) | Coverage Δ | | |---|---|---| | [apps/locations.go](https://codecov.io/gh/mattermost/mattermost-plugin-apps/pull/442?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=mattermost#diff-YXBwcy9sb2NhdGlvbnMuZ28=) | `4.76% <0.00%> (-0.96%)` | :arrow_down: | | [apps/permissions.go](https://codecov.io/gh/mattermost/mattermost-plugin-apps/pull/442?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=mattermost#diff-YXBwcy9wZXJtaXNzaW9ucy5nbw==) | `33.33% <36.84%> (-6.67%)` | :arrow_down: | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=mattermost). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=mattermost)

:umbrella: View full report at Codecov.
:loudspeaker: Do you have feedback about the report comment? Let us know in this issue.