Merge branch 'project-list-icons-width' into 'master'

Fixed width on project visibility icon in project list

## What does this MR do?

Gives fixed width to the project visibility icons in the project list so that they all correctly line up with each other.

## What are the relevant issue numbers?

Closes #19583 

## Screenshots (if relevant)

![Screen_Shot_2016-07-07_at_12.49.58](/uploads/bffa097c5c0e0a1339bbd4d7ea15d84f/Screen_Shot_2016-07-07_at_12.49.58.png)

See merge request !5137

CHANGELOG

@@ -289,6 +289,7 @@ v 8.10.0
   - Metrics for Rouge::Plugins::Redcarpet and Rouge::Formatters::HTMLGitlab
   - RailsCache metris now includes fetch_hit/fetch_miss and read_hit/read_miss info.
   - Allow [ci skip] to be in any case and allow [skip ci]. !4785 (simon_w)
+  - Made project list visibility icon fixed width
   - Set import_url validation to be more strict
   - Memoize MR merged/closed events retrieval
   - Don't render discussion notes when requesting diff tab through AJAX