fdo#67796: sw: fix table cursor when setting language in status bar

Unfortunately it turns out that the neat hack in commit
b227a8e4 does not work unless something
actually _deletes_ the current m_pTblCrsr between Push() and Pop(),
e.g. by calling SwCrsrShell::ClearMark() or KillPams().

It would be possible to do some invalidation of m_pTblCrsr in
SwCrsrShell::ClearUpCrsrs() or UpdateCrsr(), to set it's bChg flag
or perhaps call ParkTblCrsr(); not sure if doing that is an improvement;
certainly it shouldn't be tried in a 4.0.6 backport.

So work around the problem locally in SwTextShell::Execute().

Change-Id: I2981506b3065e824532deda28d21dad4a5734a8c

sw/source/ui/shells/textsh1.cxx

@@ -322,9 +322,6 @@ void SwTextShell::Execute(SfxRequest &rReq)
                 // prevent view from jumping because of (temporary) selection changes
                 rWrtSh.LockView( sal_True );
 
-                // save selection for later restoration
-                rWrtSh.Push();
-
                 // setting the new language...
                 if (!aNewLangTxt.isEmpty())
                 {
@@ -363,6 +360,12 @@ void SwTextShell::Execute(SfxRequest &rReq)
                         bForSelection = false;
                     }
 
+                    if (bForParagraph || !bForSelection)
+                    {
+                        rWrtSh.Push(); // save selection for later restoration
+                        rWrtSh.ClearMark(); // fdo#67796: invalidate table crsr
+                    }
+
                     if (bForParagraph)
                         SwLangHelper::SelectCurrentPara( rWrtSh );
 
@@ -381,11 +384,12 @@ void SwTextShell::Execute(SfxRequest &rReq)
                         SwLangHelper::SetLanguage( rWrtSh, aNewLangTxt, bForSelection, aCoreSet );
                     rWrtSh.EndUndo();
 
+                    if (bForParagraph || !bForSelection)
+                    {
+                        rWrtSh.Pop(false); // restore selection...
+                    }
                 }
 
-                // restore selection...
-                rWrtSh.Pop( sal_False );
-
                 rWrtSh.LockView( sal_False );
                 rWrtSh.EndAction();
             }