Added css class for sorted columns

[sreichel]

Description (*)

Added CSS class for sorted grid column.

Slighty darker background ...

Questions or comments

Maybe someone can check this and open PRs ...

• select a grid row should add css-class selected to <tr> element (at least in OM admin theme a css-selector is already there)

    tbody tr {
      &.selected td {
        background: $color_alice_blue_approx;
      }

Contribution checklist (*)

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All automated tests passed successfully (all builds are green)

[github-actions]

Unit Test Results

1 files  ±0  1 suites  ±0   0s ⏱️ ±0s
0 tests ±0  0 ✔️ ±0  0 💤 ±0  0 ❌ ±0 
7 runs  ±0  5 ✔️ ±0  2 💤 ±0  0 ❌ ±0 

Results for commit 84fd844. ± Comparison against base commit 7358174.