Avoid some memory allocations

Change-Id: I6f3cba58307babd9e34be0c3f52e25b5f67b23e3
Reviewed-by: Jochen Becher <jochen_becher@gmx.de>
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/libs/modelinglib/qmt/diagram_controller/diagramcontroller.cpp

@@ -119,7 +119,7 @@ public:
             return false;
         }
         // join other elements into this command
-        foreach (const DElement *otherElement, otherUpdateCommand->m_clonedElements.values()) {
+        foreach (const DElement *otherElement, otherUpdateCommand->m_clonedElements) {
             if (!m_clonedElements.contains(otherElement->uid())) {
                 DCloneVisitor visitor;
                 otherElement->accept(&visitor);

src/libs/modelinglib/qmt/stereotype/stereotypecontroller.cpp

@@ -73,7 +73,7 @@ QList<Toolbar> StereotypeController::toolbars() const
 QList<QString> StereotypeController::knownStereotypes(StereotypeIcon::Element stereotypeElement) const
 {
     QSet<QString> stereotypes;
-    foreach (const StereotypeIcon &icon, d->m_iconIdToStereotypeIconsMap.values()) {
+    foreach (const StereotypeIcon &icon, d->m_iconIdToStereotypeIconsMap) {
         if (icon.elements().isEmpty() || icon.elements().contains(stereotypeElement))
             stereotypes += icon.stereotypes();
     }