Exp: Quickfilter with stored filter

[hluxem]

I sometimes use more than one stored filter with the quick filter panel. 
When you use multiple stored filters, it would simplify things if the button was split. Clicking on the left side switches the stored filter on or off. Similar to the button for metadata write back. 
Clicking on the arrow opens the list and the list stays open for multiple selection. Another click on the arrow closes the list.
Even if you use one stored filter repeatably, it saves a mouse move to select the filter.