QmlDesigner.propertyEditor: some css tweaking

share/qtcreator/qmldesigner/propertyeditor/Qt/aspectlock.css

+QPushButton {
+    border-image: url(:/qmldesigner/images/aspectlockoff.png);
+ }
+ 
+  QPushButton:pressed {
+    border-image: url(:/qmldesigner/images/aspectlockset.png);   
+ }
+ 
+ QPushButton:checked {
+    border-image: url(:/qmldesigner/images/aspectlockset.png);
+ }

share/qtcreator/qmldesigner/propertyeditor/Qt/propertyEditor.css

@@ -232,6 +232,10 @@ QComboBox[editable="false"] {
 	spacing: 2px;
 }
 
+QFontComboBox {
+    padding-left: 16px;
+}
+
 QComboBox[editable="false"]::drop-down {
     subcontrol-origin: padding;
     subcontrol-position: top right;