IDEA-136683 user should be able to use the same config dir for IDEA 14.0 and...

IDEA-136683 user should be able to use the same config dir for IDEA 14.0 and IDEA 14.1 — read description as empty string if omitted

platform/platform-impl/src/com/intellij/openapi/actionSystem/ex/QuickList.java

@@ -202,7 +202,7 @@ public class QuickList implements ExternalizableScheme {
 
     myDisplayName = element.getAttributeValue(DISPLAY_NAME_TAG);
 
-    myDescription = element.getAttributeValue(DESCRIPTION_TAG);
+    myDescription = element.getAttributeValue(DESCRIPTION_TAG, "");
 
     myReadonly = Boolean.valueOf(element.getAttributeValue(READONLY_TAG)).booleanValue();