Beautiful Apps Engine: Update #1160

In this Tuesday update, bugs killing, flat design sneak peek, preparing Live+ section, ... and more. In fact, a lot of new features already available in the engine but that will be released in a couple of weeks.

- coming soon Live+ section: we have added a loading screen when opening the section
- coming soon Live+ section: we have added the error screen
- coming soon Live+ section: bug fixes
- new navigation mode: SLATE
- bug fix: we no more display an error message when your users upload a picture from the submit section
- apps no more freeze when you selct a twitter account before tweeting a content
- bug fix: no more crash after a retweet

- new: more cutomization in the swipe menu. Choose different colors for icons, titles and cell's background
- new: users cn download your photos on their device
- display fix: we modify the color of the content in the settings section, so that it's more readable
- bug fix: ne more crash when the app displays a "Custom url" section
- bug fix: retweet works fine now
- bug fix: the localisation of the date is now correct for apps in Japanese