pomigrate2 sr and sr-Latn translations (related: fdo#86550)

l10ntools do not tolerate missing files

Change-Id: I45547fe19e6230d4eb6f48e241310af3ff3ba8c3
(cherry picked from commit a1da2c880cef1ad5289ed78dc345e8c3ef94fb28)
Updated Slovenian translation

Change-Id: If09c11b1ab329e87a077d598d8c71d9eed7bc234
(cherry picked from commit 78a223e7931ed04859cfe0c8bd834c4956e50e0b)