Cancel remote disc streaming connects faster

[unknownbrackets]

Previously, if you hit cancel, you could wait many seconds for your cancel to register, and the UI would appear to hang.

Now, it checks the flag while connecting, so it cancels much quicker - less than a second always.

This also puts Back in a fixed position at the bottom of the dev tools screen, streaming connect screen, and streaming settings screen. I left it on the right side in the streaming browse area.

-[Unknown]

[hrydgard]

Nice!

By the way I found a related issue a while ago, that I then forgot about - if you leave HTTP URLs in the Recent list that are no longer available (say the server is down), PPSSPP can hang a long time trying to show the Recents screen...

[unknownbrackets]

That shouldn't happen, at least not anymore. The problem was on startup, we did a (synchronous) Exists check on every item in the Recent list. It should probably do it, and just be async.

Anyway, the workaround I added in #8845 was to always pass http URLs, so they would fail only once clicked or once the game info in 429346b.

-[Unknown]

[hrydgard]

Okay, I'll see if I can repro later.

[hrydgard]

Oh yeah, there was another Exists() call coming from GameInfoCache that hung, should probably work to replace it with ExistsFast...

[unknownbrackets]

Hmm, I just tested it with a bad IP and an IP not listening on port 80, and it was fine? Was something listening on the port, but not actually serving HTTP?

-[Unknown]

[hrydgard]

I think what I did was that I had a PPSSPP game server running on one machine on my local network, played from that on the other machine, then I shut down the server (the entire machine or just PPSSPP, don't remember) and started the emulator again on the other machine. As it tried to load the icon to display, it hung. But maybe I committed a workaround that I don't remember :)