QmlDesigner: Update icon font

* Add flow action, flow transition and search

Change-Id: I87fc48904b5f1a56aca34f2a66b2aef4657d86bc
Reviewed-by: Brook Cronin <brook.cronin@qt.io>
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

src/plugins/qmldesigner/components/componentcore/theme.h

@@ -99,6 +99,8 @@ public:
         distributeSpacingVertical,
         distributeTop,
         edit,
+        flowAction,
+        flowTransition,
         fontStyleBold,
         fontStyleItalic,
         fontStyleStrikethrough,
@@ -115,6 +117,7 @@ public:
         plus,
         redo,
         rotation,
+        search,
         splitColumns,
         splitRows,
         startNode,