Improved UI

- Added close button outside the bottom bar
- Added option to show/hide the close button on mobile devices
- Always close on swipe (option removed)
- Bars always hidden on mobile devices (option removed)
- Changed layout a bit
Merge branch 'dev'
fixed typo at row 749
Merge branch 'dev'
Merge branch 'master' of https://github.com/brutaldesign/swipebox