Print Activity: Use a single (re-implemented) parsing logig for page ranges.

- Support unbounded ranges, e.g. 4- == 4-pageCount and -2 == 1-2
- Do not allow reverse ranges, i.e. 7-3 is not allowed anymore
- restrict characters that can be typed into field
- force numeric keyboard

- Fix bug that we update the selected pages even if the page ranges are
  invalid

Fixes: 13126748
Change-Id: I515d9346ceb152a41b7260792c5dd9bd91b27cab