Desktop client category was renamed, old link was 404 - see: https://central.owncloud.org/t/new-central-categories-you-decide

This should fix the current CI run too

The ignore patterns for the journal files are hardcoded. Add them to
the UI to make them discoverable.

When synchronizing a folder on a samba share, creating files that begin
with ._ is often forbidden. This prevented the client from creating
its ._sync_abcdef.db file.

Now, it'll check whether the preferred filename is creatable, and if
it isn't it'll use .sync_abcdef.db instead.

The disadvantage is that this alternative path won't be ignored by
older clients - that was the reason for the ._ prefix.

Since ResetEvent() is never called, the call to WaitForMultipleObjects()
can always return immediately once the event has been signaled.

Avoid stopping the worker thread immediately if the stop variable happens to be true.