Swedish translation of *-application.json

[KristofferBroberg]

Might come in handy for some!

I understand that at this point some strings are still hard coded and thus won't be affected by this JSON. This is my frist PR ever so if I've done any mistakes, please do tell!

[taylortom]

Many thanks for this Kristoffer, we're aiming to get this into release 0.7.

[lc-thomasberger]

Thanks @KristofferBroberg , looks very good to me.

Unfortunately there are 2 keys missing: app.maxfileuploadsize app.uploadsizeerror