WEB-12348 Quick fixes not always working in Inspection window
(cherry picked from commit 769a599)
don't hold reference to PsiFile
(cherry picked from commit 89905f6)
implement equals and hashCode to make two LocalQuickFix instances equal if they refer to one and the same IntentionAction
(cherry picked from commit 26af3f5)
reuse LocalQuickFix because several instances can be handled badly
(cherry picked from commit 6f417af)