IDEA-131263 Visual issues with editor gutters: omg!
Do not commit document on space

- commit is not needed anymore due to changed logic of multicaret handling
- reimplement SpaceTypedHandler with TypedHandlerDelegate
- commit single document for custom templates
IDEA-131263 Visual issues with editor gutters: better painting for brace matcher and other custom LineMarkerRenderers
Asynchronous completion provider in TextFieldWithAutoCompletionContributor now correctly stops upon cancellation
EA-62255 - fix exception happening when changes are undone on auto-import-enabled file
avoid an exception when document saving is preformed in CaretModel.runForEachCaret context