Allow user to modify joint type

[mjcarroll]

🎉 New feature

Summary

Adds support for editing the type of a joint in the component inspector.

Test it

1. ign gazebo -v 4 pendulum_links.sdf
2. Take note of the output from ign model -m double_pendulum_with_base
3. Select a joint in the entity tree.
4. Make some changes to the joint types in the component inspector.
5. Rerun ign model -m double_pendulum_with_base and you should see the changes.

Checklist

• Signed all commits for DCO
• Added tests
• Added example and/or tutorial
• Updated documentation (as needed)
• Updated migration guide (as needed)
• 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

[iche033]

Works for me. I think we'll just need to attach a components::Recreate component to the model for the model to be recreated on the server side. There are some conflicts.

[codecov]

Codecov Report

Merging #1198 (6cb59a5) into model_editor (d392d0f) will decrease coverage by 0.14%.
The diff coverage is 10.76%.

@@               Coverage Diff                @@
##           model_editor    #1198      +/-   ##
================================================
- Coverage         59.99%   59.84%   -0.15%     
================================================
  Files               268      269       +1     
  Lines             21484    21549      +65     
================================================
+ Hits              12890    12897       +7     
- Misses             8594     8652      +58     

Impacted Files	Coverage Δ
.../plugins/component_inspector/ComponentInspector.hh	28.57% <ø> (ø)
src/gui/plugins/component_inspector/ModelEditor.cc	5.84% <0.00%> (-0.04%)	⬇️
src/gui/plugins/component_inspector/JointType.cc	9.52% <9.52%> (ø)
.../plugins/component_inspector/ComponentInspector.cc	6.67% <100.00%> (+0.16%)	⬆️

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[nkoenig]

Works for me. I think we'll just need to attach a components::Recreate component to the model for the model to be recreated on the server side. There are some conflicts.

Done in 106997f