scary wording on big changes

[jospoortvliet]

The desktop client has some logic to detect potential sync issues. If, for example, a backup is restored on the server, it will seem that all files are changed - but, of course, the version on the client is probably newer. The client then explains the problem to the user and presents them with two options:

Keep Files or Remove all files

Now we know users don't read and just looking at the options, there seems only one sane option: OF COURSE you want to keep your files! However, if the warning was simply triggered because you uploaded/modified a lot of files on another system, this option will undo all those changes, resulting in data loss.

I suggest we rename these options:

Keep Local Files or Download New Files

@jancborchardt @camilasan

[jancborchardt]

Sounds good! (Except only first word should be capitalized ;)

[k1l1]

I made some changes, translations are still missing. #246
First time contributing here, so "sorry" if I forgot something.