Issue title: Problem uninstalling a component (gallery)
 Issue body: stratboy created Redmine issue ID 2530

(revo 2.0.4)

If I uninstall Gallery, I continue to see it under the components menu item. Even if I force permanent removal (by following the right click options), I continue to see it under the components menu.

Also, (but maybe this is unrelated or it depends on the component, not on modx) the gallery component simply doesn't work. I made some posts very recently under the general support forum.

 Comments: 
 Comment 0: splittingred submitted:

Please post bugs related to Gallery under Gallery issues on Github:

http://github.com/splittingred/Gallery/issues

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