New builds are generated every hour actually. I'm not sure where you uploaded slingshot_hu.properties file. In activities feed there are 3 actions:
joinpaintball deleted 344 suggestions in Hungarian
Jul 11, 2016 (15 minutes ago) - Undo - Details
joinpaintball uploaded 249 translations into Hungarian
Jul 11, 2016 (41 minutes ago) - Undo - Details
joinpaintball suggested 101 translations into Hungarian
Jul 11, 2016 (55 minutes ago) - Undo - Details
Builds were generated 1 hour 10 minutes ago and 10 minues ago. So your translations are not in these builds. About "Approve" action - it's available for the first translator in the language. If he will be inactive and you will need it, adminsitrators will transfer this permission to another user who translated Alfresco to this language. But on this stage you don't need it, you will need it when there will be many translations of the same string and you will need to select the best.