Platform: IDEA-125277 provide extension to allow non-project file modifications without notifications
(cherry picked from commit 9ed02a6)
Platform: IDEA-125330 Warning about non-project file modification should be merged with Read-only warning and shown in a modal dialog
(cherry picked from commit 6c0132d)
EA-57177 - assert: DataManagerImpl$MyDataContext.getData
(cherry picked from commit a845e5d)