I have a suggestion:
Is it possible to implement an option for the editor-user to hide or show the hint for the hierarchy-box and the files?
If the hint pops up you have to move the mouse outside of the box to make it disapear. The hint obscures the text underneath.
The hint is good when you use the editor for the first time, but for experienced people this is no longer necessary.
What do you think?
Good point – these hints are too long and are a bother for experienced CGE users.
I’m not yet sure how to address it. Adding a preference option to make these hints shorter/disappear is the safest solution, but also does not feel not optimal – I mean, many people would not even know about this preference option, so the hints would be bothersome to them still.
Maybe instead we should just make these hints shorter, or even non-existing, for everyone, just like that. Some of the things communicated by hints is possibly obvious to users (that you can select in hierarchy, or double-click on files). Some of the things there are maybe important but should be communicated in other ways (e.g. that dragging transforms with “Ctrl” we don’t preserve the world transformation of target).
Let me think about this 
Research what others do (Godot, Blender, Unity, Unreal…) are also welcome. That is, do others display some hints, and how do others communicate the things mentioned in these hints.
Couldn’t we think of adding a “show/hide hints” checkbox next to the Hierarchy label?
Personally I didn’t read hints this, but use Shift, Ctrl and dragging.
Because it is a standard options of interaction with something in GUI 
I think, most people who ready try with the game engine immediately will try some standard hotkeys in work. They usually have basic experience with PC soft.
Perhaps they are indeed a bit excessive…
yes, with Ctrl the hint disappears. With Ctrl and Shift the hint never appears.
But allways push some buttons? The hint could disappear automatically when the mouse moves again or an option for the user to show or hide.
