Add multiple class help buttons in inspector
The property panel alternative to https://github.com/godotengine/godot/pull/13924 proposed by @groud.
I admit I actually like this a lot.
In most cases you will click on the top class doc button, e.g. Node2D
. In terms of position this seems to me fairly similar to clicking one central doc button in the inspector's history button area as proposed by @djrm.
PR includes a hack/fix in scene/gui/tree.cpp
to allow buttons to use the custom cell background color.