Squish: Stabilize selectFromCombo

I keep losing the second mouseClick in tst_create_proj_wizard...

Change-Id: I45f37c848c7eccd9fd59c455e8d6c80c6de88c06
Reviewed-by: Christian Stenger <christian.stenger@digia.com>

tests/system/shared/utils.py

@@ -102,6 +102,7 @@ def selectFromCombo(objectSpec, itemName):
         return False
     else:
         mouseClick(object, 5, 5, 0, Qt.LeftButton)
+        snooze(1)
         mouseClick(waitForObjectItem(object, itemName.replace(".", "\\.")), 5, 5, 0, Qt.LeftButton)
         test.verify(waitFor("str(object.currentText)==itemName", 5000),
                     "Switched combo item to '%s'" % itemName)