Polish translation updated

Few trings updated. It's far from being full, but deals with
most of options directly seen in Settings app.

Patch-set 2: Fixed whitespaces and tabs.

Patch-set 3: Removed blank lines.

Signed-off-by: utak3r <piotr.borys@gmail.com>
Change-Id: I797de44c9308b44259c375c268b4ef964ae4a036