MPS-17636 darcula: show method implementations (ctrl-shift-i):editor has a wrong background color
fix switch between implementations
Merge branch 'master' into victor/bugs

Conflicts:
	editor/editor-runtime/source/jetbrains/mps/nodeEditor/EditorComponent.java
	workbench/mps-workbench/source/jetbrains/mps/workbench/components/ShowImplementationComponent.java
Merge branch 'master' into victor/bugs
MPS-17556 Comment for generator macro in darcula should look better.
MPS-17557 Change colors for mapping labels in generator in darcula