Omni Gears: Polish translation

PS1 - initial translation
PS2 - corrected typos
PS3 - merged with https://gerrit.omnirom.org/#/c/3470/
PS4 - fixed build errors

Change-Id: I345e3c2ffedc7e0bb3927d594a0e46649c01a23c
merge changes from Omni 4.4 into local branch