All items in the game should have context menus.

When clicking on some things, like a population center I get a big unwieldy mess of attached dialogs that cover up too much of the screen.
In this case, I just want to see the smaller dialog at most times to just see the overview. The big giant dialog on the left should normally be hidden and should either open with an 'arrow' button or shown by right clicking and opening that as a separate dialog that can be moved independantly on the screen.
Also priorities should not be shown on the side of dialogs but should be integrated with the dialog.
Changing priorities should work just like any other dropdown list in normal windows dialogs.
Games really should emulate the standard windows dialog way of doing things. They are just more intuitive and easier to use.