Data view choice for layers in Map widget
I thought it would be nice to choose between different data views of a feature layer in the Map widget the same way you can choose a data view for Table, Feature Info and some other widgets.
Here's my example. I have a map with a point layer of recycle bins and a polygon layer which represents areas within 3 min walk for each of the bins. The map looks quite crowded because the polygons overlap each other quite a lot, so I have set the trigger to filter just the relevant polygon feature when a point feature is selected. 
Ideally, I would like the polygon layer to not display any geometry until the filter (or selection) has been triggered... So either it could have an empty default view (that would afterwards be overwritten with the selection trigger), or I could opt for the selected features data view for the Map widget.