Fix from Philippe to a rectangular selection staing active after the user starts navigating with cursor keys.
Fix from Philippe to a rectangular selection staing active after the user
starts navigating with cursor keys.

R1dO/scintilla_clone,R1dO/scintilla_clone,R1dO/scintilla_clone,R1dO/scintilla_clone,R1dO/scintilla_clone,R1dO/scintilla_clone,R1dO/scintilla_clone,R1dO/scintilla_clone