Abnormally wide caret button on Select a Project dropdown for Empty Issues and MRs list

Summary

The caret button on the dropdown to select a project is stretched too wide on:

  • Empty state for issues list
  • Empty state for MRs list

Steps to reproduce

  1. Create an empty project / or navigate to one without Issues or MRs
  2. Check the issues and MRs list

Example Project

https://gitlab.com/groups/gitlab-org/scalability/-/issues https://gitlab.com/groups/gitlab-org/scalability/-/merge_requests

Relevant logs and/or screenshots

Issues MRs
Screenshot_2020-03-30_at_16.47.57 Screenshot_2020-03-30_at_16.48.04

Output of checks

(If you are reporting a bug on GitLab.com, write: This bug happens on GitLab.com)

Results of GitLab environment info

Expand for output related to GitLab environment info 

(For installations with omnibus-gitlab package run and paste the output of:
`sudo gitlab-rake gitlab:env:info`)

(For installations from source run and paste the output of:
`sudo -u git -H bundle exec rake gitlab:env:info RAILS_ENV=production`)

Results of GitLab application Check

Expand for output related to the GitLab application check 
(For installations with omnibus-gitlab package run and paste the output of:
sudo gitlab-rake gitlab:check SANITIZE=true)


(For installations from source run and paste the output of:
sudo -u git -H bundle exec rake gitlab:check RAILS_ENV=production SANITIZE=true)


(we will only investigate if the tests are passing)

Possible fixes

Analogous to !19551 (merged)