[PL] Transferring translated strings from branch to branch

l10n
#1

Howdy

2 weeks ago I finished translating LibreOffice to Polish language. In the
meantime, 5.3 branch has been created and then I asked for transferring
translated strings from master.

https://redmine.documentfoundation.org/issues/2231

Due to holidays, nothing was changed. A few days later, almost 27 000 new
(or fuzzy) strings were attached to master branch. So if it is possible,
please make synchronization and import translated strings from master to
5.3.