webui: hide gfpgan part if not installed

[bakkot]

This has the first two commits from #186 just to avoid merge conflicts. Third commit is the actual logic.

This hides the GFPGAN part of the web UI (and suppresses error messages in the server console) if the GFPGAN model isn't found. I actually don't have GFPGAN installed and so can't test that it still displays when the model actually is installed, but it should.

[lstein]

I think there are LF vs CRLF issues in the changed files, making it look like the entire files are updated. @bakkot could you fix? Otherwise, everything seems in order.

[bakkot]

I think there are LF vs CRLF issues in the changed files

@lstein That's intentional; see #186. Other files were all using LF, so I switched these to match (in separate commits).

[lstein]

I think there are LF vs CRLF issues in the changed files
@lstein That's intentional; see #186. Other files were all using LF, so I switched these to match (in separate commits).
Thanks for that. I misunderstood.

[lstein]

This looks good.

[blessedcoolant]

Seems good. I'd make 2x the default value for the Upscaling Level dropdown. Currently it is not set to anything on the UI. Rest is good to go.

[bakkot]

@blessedcoolant I would think upscaling should be opt-in, even if you have GFPGAN set up? So blank (i.e. no upscaling) seems like the right default. Anyway this PR doesn't change the default.

[blessedcoolant]

@blessedcoolant I would think upscaling should be opt-in, even if you have GFPGAN set up? So blank (i.e. no upscaling) seems like the right default. Anyway this PR doesn't change the default.

I guess. But seeing an unfilled element in the UI is never good. I would ideally prefer there to be an option that just says 'None' or something. Not a big issue though.

I'm gonna do a full fledged UI when we are done with the big features and we can explore the UI options then.

[bakkot]

I would ideally prefer there to be an option that just says 'None' or something.

Looks like #192 actually does that.

[TesseractCat]

Nice way to pass config info. The #gfpgan element should be hidden by default, to prevent elements moving around when loading the page without GFPGAN installed.

[bakkot]

@TesseractCat well, either elements move around during load when it is installed or they move around when it isn't; you can't really avoid that. In practice, when running locally it's close enough to instantaneous that you're not going to see it happen. So I'm going to leave it as-is.

[lstein]

I'm going to go ahead and merge. If the aesthetics get bothersome we can always tweak later.