Removes inner shadow added to the foot of the pull-to-refresh view as per https://github.com/duckduckgo/ios/issues/8#issuecomment-41938599
The logo in Duckmode is now 60pts higher up the view (so no longer vertically centre) but thanks to some AutoLayout wizardry, is centre when the keyboard is on screen.
Adds a workaround for a bug in DDGSlideOverMenuController that would, in certain circumstances, cause the keyboard to be displayed when the menu was on screen and the current content controller was Duckmode
Increased the font size of the history items in the menu to 13pts
Updated the text colour of the menu items and story headlines to #292929
Added a drop shadow to the last story cell in any story-related table view