[layouts] Correctly set project dirty for more editing operations

nyalldawson · nyalldawson · commit 7cb38fec981f · 2018-03-06T11:24:43.000+10:00
(cherry-picked from 51286d9)
diff --git a/src/core/layout/qgslayoutundostack.cpp b/src/core/layout/qgslayoutundostack.cpp
@@ -106,7 +106,10 @@ void QgsLayoutUndoStack::push( QUndoCommand *cmd )
   if ( mBlockedCommands > 0 )
     delete cmd;
   else
+  {
     mUndoStack->push( cmd );
+    mLayout->project()->setDirty( true );
+  }
 }
 
 void QgsLayoutUndoStack::indexChanged()
