Not working on mobile

[soywod]

Add basic support, but it's hard to handle well. Backspace can't be catch => impossible to focus previous input. Also, when input is focused, text is automatically selected => need to type the new char twice.

Sources:

• https://gist.github.com/andyearnshaw/11333894
• https://stackoverflow.com/questions/22503559/backspace-not-firing-the-keyup-event-in-android-mobile/22505212
• https://stackoverflow.com/questions/10004581/jquery-input-event-does-not-fire-if-input-is-empty