If one view has an active text edit, then current code doesn't handle
manipulating the undo text outside the text edit, so avoid problems by
simply not adding an undo action to the undo stack for shape creation or
move.

Other actions might want to do the same in the future: check for
CanDoSdrUndo() before calling SdrUndoFactory member functions.

[ Found no existing test suite similar to CppunitTest_sw_uiwriter, so
added one. ]

Change-Id: I3a364bf4fe6f9b0c13aa07283681b1045368cf7a
Reviewed-on: https://gerrit.libreoffice.org/73558Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
Tested-by: Jenkins