Change color of buttons in modals

[asbates]

Changes the colors of buttons in the various modals.

• "Cancel" buttons are color "secondary".
• "Remove" buttons are color "danger"
• "Add" buttons are color "primary"

Fixes #179

[github-actions]

Code Coverage Summary

Filename              Stmts    Miss  Cover    Missing
------------------  -------  ------  -------  ----------------------------------------------------------------------------------
R/AddCardModule.R       140       1  99.29%   195
R/Archiver.R             25       0  100.00%
R/ContentBlock.R         16       0  100.00%
R/DownloadModule.R      207      49  76.33%   89-95, 138, 163-168, 177-181, 184-188, 196-200, 203-207, 214-218, 221-225, 262-266
R/FileBlock.R            13       0  100.00%
R/NewpageBlock.R          2       0  100.00%
R/PictureBlock.R         30       2  93.33%   15, 101
R/Previewer.R           292      54  81.51%   183, 199, 201-207, 210-216, 325-369
R/RcodeBlock.R           15       0  100.00%
R/Renderer.R             81      13  83.95%   158, 160-172, 198, 202
R/ReportCard.R           78       4  94.87%   72-73, 223, 244
R/Reporter.R             96       1  98.96%   255
R/ResetModule.R          55       0  100.00%
R/SimpleReporter.R       29       0  100.00%
R/TableBlock.R            8       0  100.00%
R/TealReportCard.R       31       0  100.00%
R/TextBlock.R            13       0  100.00%
R/utils.R                78      66  15.38%   7, 38-97, 99, 102-109
R/yaml_utils.R           74       2  97.30%   65, 263
TOTAL                  1283     192  85.04%

Diff against main

Filename      Stmts    Miss  Cover
----------  -------  ------  --------
TOTAL             0       0  +100.00%

Results for commit: e7d5185

Minimum allowed coverage is 80%

♻️ This comment has been updated with latest results

[github-actions]

Unit Tests Summary

    1 files    19 suites   11s ⏱️
210 tests 210 ✔️ 0 💤 0 ❌
359 runs  359 ✔️ 0 💤 0 ❌

Results for commit c02a0a7.

[donyunardi]

Felt like we can do better when the button is disabled (blue and grey just not pleasing to the eye).

How about we make these changes in Previewer.css,

teal.reporter/inst/css/Previewer.css

Lines 10 to 15 in 67c71ea

	a.disabled {
	color: grey;
	cursor: not-allowed;
	pointer-events: none;
	text-decoration: none;
	}

To be like this:

a.disabled {
  color: white;
  background-color:#6a98bf;
  border-color: #6a98bf;
  cursor: not-allowed;
  pointer-events: none;
  text-decoration: none;
}

So now, the button looks like this when disabled:

And this when enabled:

I'm keeping the color scheme (btn-primary) but just making it a bit lighter when disabled.

[donyunardi]

I just read my comment again and realized that this might be out of scope from the main issue.
I'd be happy to create a new issue if we can't squeeze this in.

[asbates]

@donyunardi I think the disabled color should be a new issue. Mostly because it needs more thought around how to adjust the color. While your suggested style changes look better, I wouldn't recommend using a color directly like #6a98bf. It may match the theme in the screenshot, but what if I use Bootswatch United? What if I define my own custom primary color?

[kartikeyakirar]

Tested changes for issues. PR looks good.