"Followed" page is now sorted by notation for each postal code. Notes
left about the flats are listed in the list, to help have a good
overview of the followed flats.
This closes issue #45.
The mobile UI is now more responsive, without grid in the details view.
Clicking on a line in the flats table sends the user to the flat
details. Also features better title descriptions and reactive title of
the tab.
* Add a database field to store `notes` (as a memo) about flats.
* Add matching UI elements to let users store their notes about flats.
This commit closes issue #34.
Lucas Verney