This replaces all the deprecated 3d Overlays for Local Entities.
No functional changes, only technical.
Many variables have been renamed for clarity.
(Mainly the term "overlay" that were used to designate the elements of the selection tool.
Now it refer to "toolEntity" to designate the entities composing the Selection Tool.)
The color of the different elements of the selection tools has also been adjusted.
They are now more contrasted and more vivid.
(The green and the blue of the previous version were too much close at the point that
some color blind people might have difficulty to differenciate them.)
Simpler solution without any hazardous uniqueness check.
Cloned entities will systematically get the suffix " (2)", unless their name has already a suffix.
In that case, we simply increment the suffix.
This enhancement adds an incremental suffix to the name
of the cloned entities resulting from "Duplicate" and "Paste".
The goal is to help to figure which entities is the coned one.
This addresses issue #575
