IDEA-199826 Switching from read-only file to editable one incorrectly repaints status bar indicators

don't forget to invalidate the component after updating its state

[uast-java] `ArrayMappingListView` converted to `PsiArrayToUElementListMappingView` with optimized `contains`

Now it could include any non-space characters except of leading braces and brackets

Action was moved in aea35f1a

Fix regression after : 3f78fed5
                       da1f40a7

EA-109600 - NA: EditorImpl.<init>

It was an artifact of the past when GrSignature could contain several signatures at once (GrMultiSignature).

It's no longer used to compute applicability.

we can't do read action in FileContentQueue, because it can run concurrently with a write action waiting for it (at least in tests), and that would produce a deadlock

add test

This reverts commit 95046920

- skip processed classloaders when doing findResource, getResourceAsStream, findResources
- do not even try to load class with qname starting "java." or "javax."

IDEA-CR-39679 restore useful validity check (e.g. EA-125970 - assert: PsiReferenceExpressionImpl$TypeEvaluator.fun)

(Run Configurations case)

This is how it was:
tox [arguments] -e py27
It worked for all cases except
tox -- args-for-env -e py27

This is how it works now
tox -e py27 [arguments]