FF 4.0.6 (Bug) You can´t edit a filter if you use the search

I have found something that may be a bug, and is that if in FF 4.0.6 you use the search for a filter, and then after select one of the filters in the search result, then if you go to edit this filter, the edit is disabled, and you can only make a NEW filter.

1 - Make a search for a filter
2 - Select one filter in the search list
3 - Go to the "Filter Editor" button far right
4 - Try to open the filter editor to edit the filter
5 - You can´t do it because the edit is disabled

BUT if you instead of selecting the filter in point 2, you double click on the same filter, it will open directly inside the filter editor without having to go the "filter editor" button and choose open in editor.

The filter editor is ONLY disabled when using the search, in any other situation is enabled right