Here I got one that really should be implemented:

A tree of the widgets present on a page, the activity/page tree could be extended with the widgets.

Why would I need this? Sometimes I put lots of widgets one over another (as I believe many people do) and show the one I need. As things are now, if I want let's say change the image of one of the widgets that is somewhere deep under, i first have to move all of the other widgets from above of the intended widget and then perform the image swap. Then obviously reposition the widgets one over the changed one.

With the proposed enhancement, the integrator would simply choose the widget from the tree and apply the new image (or do anything else with it). Of course the tree should be collapsable.

A further enhancement would be the inclusion of the groups.

EDIT: I created a mockup of how it could look like:


What do you think about this? I also believe it should not be hard to implement.