Godot: Project Export Patch does not work

[Galileo53]

Godot version:
V3.0.6

OS/device including version:
WIN7

Issue description:
When trying to make a patch at the Export dialog, nothing happens

Steps to reproduce:

1. Export a project, using Project - Export - Export Project. This creates export.pck.
2. Do some changes, e.g. in a .gd file. Save the file.
3. Open Project - Export - Patches (Tab). Klick "Add initial export..." and select "export.pck" from previous step.
4. No more "previous patches" exist, so leave that alone.
5. Press "Make Patch". Nothing happens. Neither a patch is created, nor an error is given.

[exts]

Doesn't work with alpha 3.1 alpha3 (avoided alpha 4 for now) using windows 10 either w/ the classic and mono versions (cc: @akien-mga )

[exts]

tested with 3.1 beta3 mono and it's still not a thing, can't get it to work.

[reduz]

Sorry, this feature was never finished it seems. Will have to be kicked back yet again because we keep forgetting.

[reduz]

Maybe for now the tab could be hidden? what do you think @akien-mga ?

[akien-mga]

If the feature doesn't work at all, seems fine to hide it for now yes.

[Kiel97]

Looks like it's still not working in Godot 3.1.1 and it's visible in Export dialog box.

[akien-mga]

Hiding it for now with #34911.

[Calinou]

I'll close this issue as this unimplemented feature can no longer be accessed. Discussion on a new patch system is ongoing here.