Merge branch '20052-actions-table-vscroll' into 'master'

Prevent overflow with vertical scroll when we have space to show content

## What does this MR do?
Removes vertical and horizontal scroll from builds, environments and pipelines tables by adding a media query since this is only necessary in smaller screens.

## Screenshots (if relevant)
![scroll](/uploads/6b9e3584df6e4ca29553d2ff576b794e/scroll.jpg)

## Does this MR meet the acceptance criteria?

- [ ] [Changelog entry](https://docs.gitlab.com/ce/development/changelog.html) added
- [ ] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [ ] API support added
- Tests
  - [ ] Added for this feature/bug
  - [x] All builds are passing
- [x] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if it does - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?
 Closes #20052

See merge request !8061

app/assets/stylesheets/pages/environments.scss

-.deployments-container {
+@media (max-width: $screen-md-max) {
+  .deployments-container {
     width: 100%;
     overflow: auto;
+  }
 }
 
 .environments-list-loading {

app/assets/stylesheets/pages/pipelines.scss

@@ -37,13 +37,14 @@
   }
 }
 
-.content-list {
-
+@media (max-width: $screen-md-max) {
+  .content-list {
     &.pipelines,
     &.builds-content-list {
       width: 100%;
       overflow: auto;
     }
+  }
 }
 
 .pipeline-holder {
@@ -666,10 +667,6 @@
       min-width: 900px;
     }
 
-    .content-list.pipelines {
-      overflow: auto;
-    }
-
     .stage {
       max-width: 100px;
       width: 100px;

changelogs/unreleased/20052-actions-table-vscroll.yml

+---
+title: Prevent overflow with vertical scroll when we have space to show content
+merge_request: 8061
+author: