Refactor the Find Data dialog

This refactors the Find Data dialog and incoroprates into it the
functionality of the now-deprecated selection inspector panel.

The Find Data dialog now allows for users to both create new selections
and view the current global selection. Also allows the user to update
display properties (e.g. color, font) for the selection labels.

Change-Id: I4bac1cfe64e47b7c9cf7d14b9a8021a8b6d59650
Merge topic 'find-data' into next

1a88b50 Refactor the Find Data dialog