Common widget GzColor replacement

[AzulRadio]

New feature

• Part of #310

Summary

Replace implementation for lights (Lights.qml) and material color (Material.qml) in Component Inspector with GzColor introduced in gz-gui#411

For future maintainers: selecting color with the Material panel has a bug where the color of the material doesn't change when a color is selected. This bug is not introduced by this common widget.

Test it

Draft because of a possible bug in the Gazebo which causes the colors of the lights and material color can only be changed once.

Checklist

• [ ] Signed all commits for DCO
• [ ] Added tests
• [ ] Added example and/or tutorial
• [ ] Updated documentation (as needed)
• [ ] Updated migration guide (as needed)
• [ ] Consider updating Python bindings (if the library has them)
• [ ] codecheck passed (See contributing)
• [ ] All tests passed (See test coverage)
• [ ] While waiting for a review on your PR, please help review another open pull request to support the maintainers

Note to maintainers: Remember to use Squash-Merge and edit the commit message to match the pull request summary while retaining Signed-off-by messages.

[codecov[bot]]

Codecov Report

Merging #1530 (7b52abf) into ign-gazebo6 (8c9489d) will increase coverage by 0.09%. The diff coverage is 0.00%.

@@               Coverage Diff               @@
##           ign-gazebo6    #1530      +/-   ##
===============================================
+ Coverage        64.40%   64.50%   +0.09%     
===============================================
  Files              320      320              
  Lines            25892    25861      -31     
===============================================
+ Hits             16677    16682       +5     
+ Misses            9215     9179      -36     

Impacted Files	Coverage Δ
.../plugins/component_inspector/ComponentInspector.cc	5.61% <0.00%> (+0.28%)	:arrow_up:
src/Util.cc	93.11% <0.00%> (-0.33%)	:arrow_down:
src/SimulationRunner.cc	91.89% <0.00%> (+0.95%)	:arrow_up:

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

[jennuine]

This PR needs a release from gz-gui6 but I'm waiting until the plotting PR is ready and merged (ref: https://github.com/gazebosim/gz-sim/pull/1571#issuecomment-1190430491)