I.e. single click selects cell, typing activates the EditView
(and hides the cell cursor). (Previously: single click activates
the edit view, text cursor is shown, and no clean way of hiding
the cell cursor again.)

(cherry picked from commit f859dac5)

Conflicts:
	sc/source/ui/view/gridwin.cxx

Change-Id: I184630277e8935e9f8a97a856191497ec5d62111