Disable line simplify tool when 'change geometry' capability missing

Author: Sandro Santilli

src/app/qgisapp.cpp

@@ -10054,7 +10054,7 @@ void QgisApp::activateDeactivateLayerRelatedActions( QgsMapLayer* layer )
         mActionReshapeFeatures->setEnabled( isEditable && canAddFeatures );
         mActionSplitFeatures->setEnabled( isEditable && canAddFeatures );
         mActionSplitParts->setEnabled( isEditable && canChangeGeometry && isMultiPart );
-        mActionSimplifyFeature->setEnabled( isEditable && canAddFeatures );
+        mActionSimplifyFeature->setEnabled( isEditable && canChangeGeometry );
         mActionOffsetCurve->setEnabled( isEditable && canAddFeatures && canChangeAttributes );
 
         mActionAddRing->setEnabled( false );