Stop rendering cached irrelevant posts when loading the next unread page of a thread.
Rap Sheet and Leper's Colony dark theme.

Plus some cleanup while I was in town.
Fix truncated Rap Sheet/Leper's Colony reasons.

Reading the documentation can prove enlightening!
Set a UIKit tint color for dark mode.
Set theme's tintColor on window when launched.
Setting to enable forum-specific themes outside of the intended forum.

Toggleable per-theme because two lines of theme choices in a posts screen is
ugly.
Reorder a theme key.
Fix calculating height of footer views in settings screen.
Remove now-unused AwfulSettingsChoiceViewController.
Fix spurious top margin above alternate server table.
Don't bother coloring the footer on the ubiquitous theme picker, looks dumb.
!!
Target is optional, action is not.
Commentary.
A less shitty basement background.

Because why not?
AwfulThreadCell can now size itself.
Show the full thread title on the preview screen.
Show embiggened thread cell in thread lists alongside action sheet, making the whole thread title visible.
Commentary.
Long-pressing a thread in a list shows its full title.