Revert "tdf#41202 allow decrease selection with shift-click in writer"

Reverted as suggested in https://bugs.documentfoundation.org/show_bug.cgi?id=123582#c4

This reverts commit 31ba2a6b.

Change-Id: I574bacd227bdd6b0364251b060327a3e5f820965
Reviewed-on: https://gerrit.libreoffice.org/69132
Tested-by: Jenkins
Reviewed-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>

sw/source/uibase/docvw/edtwin.cxx

@@ -3656,9 +3656,11 @@ void SwEditWin::MouseButtonDown(const MouseEvent& _rMEvt)
                 if( !bOverSelect )
                     bOverURLGrf = bOverSelect = nullptr != rSh.IsURLGrfAtPos( aDocPos );
 
-                MoveCursor( rSh, aDocPos, bOnlyText, bLockView );
-                bCallBase = false;
-
+                if ( !bOverSelect )
+                {
+                    MoveCursor( rSh, aDocPos, bOnlyText, bLockView );
+                    bCallBase = false;
+                }
                 if (!bOverURLGrf && !bExecDrawTextLink && !bOnlyText)
                 {
                     const SelectionType nSelType = rSh.GetSelectionType();