fixed PY-14360Shift+enter stopped to work in "Run manage.py task..." dialog

there is no need to register shift+enter in plugin.xml for ipnb, we already registered it as custom shortcut on code source panel
Merge remote-tracking branch 'origin/master'
Merge remote-tracking branch 'origin/master'
IDEA-117343 When plugin can't be loaded (i.e. due to IDEA upgrade), related IDE settings are lost
avoid calling VirtualFile.getFileType in fileCreated because it can start detecting binary or particular type from content (IDEA-133507)
custom thread pool executor for icon calculation
(if needed) add EAP suffix for updated version (IDEA-133731)
Cleanup (less specialized type)
Cleanup (formatting; dead code)
Merge remote-tracking branch 'origin/master'
Cleanup (javadoc updated)
Allow to turn scratch on in properties (PY-14625).
IDEA-133813 'Add as ant' file should work for selection
Merge remote-tracking branch 'origin/master'
resolve package/class if field is not accessible in fqn method call (IDEA-133812)
splitter proportion fixed
calls from lambdas or anonymous classes to surrounding method are non-recursive
Platform:  CacheInvalidator api improved (javadoc improved)
return squareness for severity icons in settings dialog (IDEA-131263)
IDEA-133690 Focus stays in the editor on breakpoints dialog open