CPP-1777 Rename 'Override/Implement method' to 'Override/Implement function'
IDEA-134502 Custom file templates are gone
 IDEA-134516 Debugger shows invalid string value
IDEA-90564 Navigation bar closes prematurely if in floating mode
CCE
persistent range markers are stored in a separate tree since their update is wildly different
reduce visibility to prevent subclassing of RangeMarkerImpl which can break tree invariants