[WIP] Adding more detail to PullRequestCheckView

[StanleyGoldman]

Fixes#1967

• Adds a second line with more detail
• Adds a required flag

• Use a DataGrid instead of a list control

[donokuda]

@StanleyGoldman I pushed a couple of commits cleaning this up. This should be ready for review now but I'm happy to incorporate design changes that people might have:

Light theme

Dark theme

Blue Theme

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@ce9e5c4). Click here to learn what that means.
The diff coverage is 65.38%.

@@ Coverage Diff @@## master #2013 +/- ##
=========================================
Coverage ? 39.34% =========================================
Files ? 411 Lines ? 17619 Branches ? 2440 =========================================
Hits ? 6933 Misses ? 10125 Partials ? 561

Impacted Files	Coverage Δ
...ViewModels/GitHubPane/PullRequestCheckViewModel.cs	1.01% <0%> (ø)
...nlineReviews/Services/PullRequestSessionService.cs	17.03% <0%> (ø)
src/GitHub.Exports/Models/CheckRunModel.cs	0% <0%> (ø)
.../GitHub.UI/Converters/DurationToStringConverter.cs	25% <100%> (ø)
...rc/GitHub.Exports/Extensions/TimeSpanExtensions.cs	89.18% <89.18%> (ø)

[StanleyGoldman]

It's looking good. I tweaked it so the "Finished - 4s" part appears as a tooltip instead.

[StanleyGoldman]

[donokuda]

I went ahead and polished this up a bit:

I forced the required badge to show in order to test my styles and reverted that change in 6691ab7

[StanleyGoldman]

Changes in master seem to have reduced the design from it's previous glory...

[donokuda]

I'm taking a look at this right now and will push a fix 👀

[donokuda]

I pushed a couple of commits that fix the line spacing:

(With the required badge)

(No required badge)

---

I'm running into a layout "gotcha" where if the panel is too small, some details gets pushed off the screen:

I have ran into this a number of times throughout the extension, and I haven't figured out a good way to solve this especially in a rendered list. Open to any ideas that might help.

Other than that, I think this is ready for review again