[lipstick-colorful-home] Add configuration to put desktop icons in a predictable place.

We use the same order as Harmattan so far.
[lipstick-colorful-home] Remove useless binding on x

The page is the full width of the parent (Pager), so trying to center it makes
absolutely no sense.
[lipstick-colorful-home] More sensible launcher width that allows for more text.

Stops e.g. fingerterm being truncated.