Improve warning message when removing group

app/views/groups/edit.html.haml

@@ -68,7 +68,7 @@
           .title Remove group
           .ui-box-body
             %p
-              Remove of group will cause removing all child projects and resources.
+              Removing group will cause all child projects and resources to be removed.
             %p
               %strong Removed group can not be restored!