trwsio pethau ar ol adborth gan y cymuned / fixing things after feedback from the community
Merge pull request #295 from carlmorris/master

Ambell i newidiad i'r cyfieithiad Cymraeg / Some fixes to the Welsh translation
remove unnecessary join
distinct not needed
optimized query when only a single category is needed
prevent scrolling when using middle click
Update no.properties

spellcheck and translation
add nn
Rename no.properties to nb.properties
Create nn.properties
Merge pull request #299 from jhsoby/master

Norwegian translations; adding nn
added on-demand database cleanup (date is hardcoded for the moment)
email is now required for registration as people are forgetting their password
rename language column because language is a reserved keyword in hsqldb
restore entry heading hover effect
added missing datatype
cleanup by batch of 1000
join fetch statuses
not a good idea with maxresults, revert and use the same batch size as default_batch_fetch_size
don't delete in a big transaction