Fixed tinting color for MURSwitcherButton and cleaned up setting tint co...

...lors in the navigation area.

Adjusted the coloring of the background behind the switcher to better accommodate white buttons. Also reduced code duplication.
Moved from a `dispatch_after` on the main thread with a lot of unnecessary low-level `GCD` code to just calling a function using `performSelector:withOption:afterDelay:`
Fixed implementation of `UITableView reloadSections` to do 2 things: a) call `begin`/`endUpdates` and b) Not reload the whole `tableView` after reloading all of the cells. That’s 2 calls to do the same thing, one after each other.