Aspect ratio support

• Medias with various aspect ratios are better displayed in the detail page and in fullscreen mode.
• Allow Handoff with downloaded content.
• Display event module lead on the home event module card.
• Homepage glitches and performance issues have been fixed.
• Fixes double tap on tab which sometimes would not return to the top of a list.
• Fixes sometimes erratic scroll position when returning on a homepage.
• Fixes an issue preventing the first item in lists to be accessed with VoiceOver.