Feature/wallet creation

This PR contains:

* Intermediate screen at wallet creation (waiting for complete ring of copayers)
* Improve tooltip styles. (green color used in other places)
* Fix layout for small devices. (font and column sizes)
* Fix size of comment input for medium devices.
* Fix layout in backup page.
* Fix typo (my previous PR)
* Simple test for: getNumer (it converts a number in an array of undefined elements).