Add Skeleton Loader to Editor and Helpers columns

[bugzilla-to-github]

This issue was created automatically by a script.

Bug 1597523

Bug Reporter: [email protected] CC: @mathjazz

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.97 Safari/537.36

Expected results:

Add a content loader to make the load time look shorter

[bugzilla-to-github]

Comment Author: GitHub Bugzilla PR Linker <[email protected]>

Created attachment 9110580 Link to GitHub pull-request: https://github.com/mozilla/pontoon/pull/1500

Attached file: file_344116055.txt (text/x-github-pull-request, 44 bytes) Description: Link to GitHub pull-request: https://github.com/mozilla/pontoon/pull/1500

[bugzilla-to-github]

Comment Author: @mathjazz

Taking over as agreed with Michael: https://github.com/mozilla/pontoon/pull/1500#issuecomment-560304559