[ui] NodeActions: Update the buttons' color for submitted nodes

[cbentejac]

Description

This PR updates the color of the Node Actions buttons for submitted nodes.

Previously, they looked like this:

With this PR, they look like this:

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.88%. Comparing base (4585522) to head (a5da1b8).
⚠️ Report is 2 commits behind head on develop.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #2939   +/-   ##
========================================
  Coverage    80.88%   80.88%           
========================================
  Files           59       59           
  Lines         7857     7857           
========================================
  Hits          6355     6355           
  Misses        1502     1502           

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