fdo#74087: Inspect if a mis-spelled word is at cursor position...

then decide whether to launch a spell candidate menu or a regular context
menu.

(cherry picked from commit cd22c3442389f69fc1cc14dd07b17f5a59498e5e)

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

Change-Id: Ib121e9c6729e068c70ff216391f863639aa01951
Reviewed-on: https://gerrit.libreoffice.org/8943
Reviewed-by: Andras Timar <andras.timar@collabora.com>
Tested-by: Andras Timar <andras.timar@collabora.com>