UR_ code improvements

[bernd]

I would like to merge these: ok for you?
https://github.com/berndhahnebach/FreeC ... 7060972a2a
https://github.com/berndhahnebach/FreeC ... e078dee589
https://github.com/berndhahnebach/FreeC ... dccf5ad7c9
https://github.com/berndhahnebach/FreeC ... 2d4cf042b5

is density needed method:
https://github.com/berndhahnebach/FreeC ... 3f78d18d54
does it fit with this, which I merged today? git commit 8e25fe33dc5

selection widget
https://github.com/berndhahnebach/FreeC ... 9cf49a272a
Would it be possible to explain in short the reason for the changes?

icon file
https://github.com/berndhahnebach/FreeC ... caec7412d1
Was this done automatically by accident or do you do dislike my comments

cheers bernd

[bernd]

[UR_]

is density needed method:
https://github.com/berndhahnebach/FreeC ... 3f78d18d54
does it fit with this, which I merged today? git commit 8e25fe33dc5

*BUCKLE doesn't need *DENSITY, AFAIK.

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icon file
https://github.com/berndhahnebach/FreeC ... caec7412d1
Was this done automatically by accident or do you do dislike my comments

Fem.qrc is generated by UpdateResources.bat
Perhaps dir2qrc.py has a restricted comment policy

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selection widget
https://github.com/berndhahnebach/FreeC ... 9cf49a272a
Would it be possible to explain in short the reason for the changes?

If caller restricted selection widget to allow selection of solids only, it makes no sense to display radio buttons for enabling eg. face selection.