GLMixer Code

Changed META modifier for ALT modifier under OSX.

Bug fix in selection + graphical improvement in Catalog view.

Bug fix in selection and current source selection in Geometry view.

Bug fix in selection and current source selection in Geometry view.
+ various improvements in other views.

Bugs fix with selection & non-modifiable source.

Bugs fix with selection.

Correct behavior for non-modifiable source in every view (i.e. disable motion).
GUI minor fix (label of bool property in property manager, font, session switcher for instantaneous).

Bug fix ; avoid selecting the selection recursively.

Fixed zoom best fit for geometry view (using method to compute bounding box).

Added actions "Invert selection" and "clear selection".
Changed label of Bool Property to 'on' / 'off' (instead of 'true' / 'false')