update ru.po
Merge pull request #267 from X-NicON/next-ru-fix

update ru.po - thanks!!!
Update hr.po
new strings for translation
update ru.po
fix strings for translation
delete I18nMarker and replaced by I18n
Fixed typos in Croatian translation.
Merge pull request #268 from win32re/patch-3

Update hr.po
Merge pull request #269 from X-NicON/next-ru-fix

new strings for translation and cleanup