Disable unused checkbox in media tree view when no batch and no export
update ro and ru translations with latest keys
Merge pull request #2480 from xaben/update-translations

Update ro and ru translations for latest keys
ui improvements for ajax layout and filters
Merge pull request #2474 from PHDA/checkbox_media_tree

Disable unused checkbox in media tree view when no batch and no export
Merge pull request #2481 from juherpin/ftr-ui-list-table

UI improvements for ajax layout and filters
updated polish translations (added missing translations, fixes in grammar)
Merge pull request #2487 from jklab/master

updated polish translations
Merge remote-tracking branch 'origin/master'