Prototype of new links editor

Releasing new version of editor which is shown any time you links something (AuraIsActive, Enabling Conditions, etc)

The new one is much more flexible, so it will be easier to do any changes there. After current version will be stabilized, I'll add "Recent", "Favourites" and few other improvements I have in mind. Please report any issues you'll find or any improvements you think worth doing - the initial implementation may be buggy at first, but hopefully it will quickly get it to surpass the old variant.

Bugfixes/Improvements

• [BehaviorTrees] Fixed a problem with focus being lost when switching between BTs - this prevented Paste operation from working properly #EA-592 v7458 by oddessax
• [UI] Fixed a problem with copy-paste not working in root folder #EA-591 v7458 by oddessax