Merge branch 'cleanup-mislignments-issue-list-view' into 'master'

increased checkbox and filter button padding

## What does this MR do?

fixed misalignments as described in https://gitlab.com/gitlab-org/gitlab-ce/issues/19110

## Are there points in the code the reviewer needs to double check?

Not that I know of

## Why was this MR needed?

https://gitlab.com/gitlab-org/gitlab-ce/issues/19110

## Screenshots (if relevant)

![image](/uploads/e7c5ffe78e1a5b67fa0335ba1c231df2/image.png)

![image](/uploads/1591ed872e765da3b5ed071c8872194f/image.png)

## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry 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
  - [ ] All builds are passing
- [ ] 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)
- [ ] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [ ] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)


## What are the relevant issue numbers?

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/19110

See merge request !6206

CHANGELOG

 Please view this file on the master branch, on stable branches it's out of date.
 
 v 8.12.0 (unreleased)
+  - Cleanup misalignments in Issue list view !6206
   - Prepend blank line to `Closes` message on merge request linked to issue (lukehowell)
   - Filter tags by name !6121
   - Make push events have equal vertical spacing.

app/assets/stylesheets/framework/nav.scss

@@ -138,7 +138,7 @@
     }
 
     li a {
-      padding: 16px 10px 11px;
+      padding: 16px 15px 11px;
     }
 
     /* Small devices (phones, tablets, 768px and lower) */

app/assets/stylesheets/pages/issues.scss

@@ -9,7 +9,7 @@
 
     .issue-check {
       float: left;
-      padding-right: 8px;
+      padding-right: 16px;
       margin-bottom: 10px;
       min-width: 15px;