3 ➡️ 4

[chapulina]

Forward-port

Port ign-gui3 to ign-gui4.

Branch comparison: ign-gui4...ign-gui3

Note to maintainers: Remember to Merge with commit (not squash-merge or rebase)

[codecov]

Codecov Report

Merging #196 (979999a) into ign-gui4 (ec49c33) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           ign-gui4     #196   +/-   ##
=========================================
  Coverage     58.16%   58.16%           
=========================================
  Files            24       24           
  Lines          3069     3069           
=========================================
  Hits           1785     1785           
  Misses         1284     1284           

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[ahcorde]

Some tests on Focal are failing:

  [GUI] [Wrn] [Application.cc:649] [QT] could not connect to display :1.0
  [GUI] [Err] [Application.cc:653] [QT] This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
  
  Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, xcb.

[chapulina]

Some tests on Focal are failing:

All the failures to connect to display are known flakes: #58