[4.0.7] polygonroi shift-click + remove contour

[mathildemerle]

Mini release 4.0.7 following tests by radio operators. There will be other PR.

When PolygonROI toolbox have been partially changed with multi view and shift click to draw, and then that the multi view have been removed, shift click stayed. We removed this shift click because radio operators did not like the functionality. Then they retested and a deactivate/reactivate drawing button to deactivate PolygonROI have been removed due to the changes done in PolyronROI, that is still missing. It's important to be able to change the contrast or zoom during the drawing. So, they prefer to use shift click, or to have the button back. This PR adds back the shift click.

Also, there was a bug when you removed the last node/contour with right-click -> remove. The current default label needed to be reclicked/selected.

Ⓜ️

[mathildemerle]

I updated the release notes for https://github.com/Inria-Asclepios/music/pull/1100
And also, VoiCutter processOutput() method do not need to add the data name suffix (metadata are already updated at that time in output data, and this line crash sometimes).