Since the vast majority of message boxes should be modal, require
the parent window to be passed in, which can be nullptr for the
rare case that they don't. By it being the first argument, the
default arguments also don't need to be explicitly stated in most
cases, and it encourages passing in a parent window handle.
Fix up several message boxes that should have been modal.
Clients now receive HTTP status codes like 200, 404, etc.
Note that a 404 with content is still considered a "successful"
download from ProtocolServer's perspective. It's up to the client
to interpret the status code.
I'm not sure if this is the best API, but it'll work for now.
We now allow you to download files by right-clicking a link and then
choosing "Download".
All files are currently saved to the standard downloads location that
we get from Core::StandardPaths::downloads_directory().
In the future, we'll probably want to come up with a more restrictive
way of doing the "write to disk" portion of this.
We should also improve the ProtocolServer to allow streaming of data
instead of writing everything in one big go.
At the moment, I'm just pretty happy with this GUI. :^)
