Adding new requirement associations

The "Add New Association" is one example of such a box that would better if it were resizable, movable, and if its internal elements -- like the tree list -- were fluid and/or responsive to changes in the size of the dialog box.  So, if you make the overall dialog box bigger, the tree list element should get bigger.  And vice versa.

Another two boxes that would be improved by such functionality are on the page at Administration > System > Edit Reports > Edit Report Details.  Specifically the boxes for Add/Edit Standard Section and Add/Edit Custom Section.

Incidentally -- and this is probably a separate enhancement request -- the "Description" field that exists on many artifacts would also really benefit from being resizable.