updated translation resources
CC-5838: Editing a repeating show yields in error if an instance is in the past

Was not checking if show is repeating properly
Merge branch '2.5.x' into cc-5709-airtime-analyzer

Conflicts:
	airtime_mvc/locale/hu_HU/LC_MESSAGES/airtime.po
	airtime_mvc/locale/nl_NL/LC_MESSAGES/airtime.po