[PATCH] Selection order is not preserved when renaming entities

[Deiz]

As the GUI's selection state depends on SpiderMonkey's ordering of keys in objects (insertion order), detecting renamed entities, removing the old and adding the new will shift entities from their old position to the end of the selection.

The only way to preserve the order is by rebuilding the selection and groups as necessary, which is luckily quite simple.

[Jonathan Waller]

In 12192:

Preserve selection order when entities are 'renamed'. Patch by Deiz/F00. Fixes #1544.
e.g. If you have a long wall as primary selection and CC as secondary, after the gate upgrade the wall (now gate) remains the primary selection.

[Jonathan Waller]

Some pretty minor polish, nice to have though :).