Population And Border Growth Notification

Show notifications for every new citizen or tile acquired in any city. If you click on the notification icon the corresponding city should be focused. Probably without entering city view. So you can cycle through cities that grew and enter city view manually only when needed.

Start by locating the existing notification icon and the code handling citizen growth, tile acquisition, and city focus. Test how notifications are currently displayed and verify that each growth event can be cycled through, focuses the corresponding city without entering city view, and allows manual entry afterward.

Written by the indexing model from the issue text.