Allow to disable joypad support

[timothyqiu]

It's convenient to use a joypad as a shortcut keyboard via tools like xpadder and JoyToKey. It's popular for things like drawing and audio/video editing.

The problem is that switching to Godot always captures the joypad. To setup the joypad as a keyboard again, one has to disconnect the joypad, close Godot, then reconnect the joypad.

I suggest allowing to disable joypad support at runtime. Or at least adding a --disable-joypad command-line argument to disable it when the engine starts.

[zhyohaGit]

This is a very good suggestion, and I really hope that it can be supported in future versions of Godot.

[Calinou]

This could also be a workaround for godotengine/godot#20566, so it makes sense to provide a CLI argument for this. Many other engines like Source provide a similar CLI argument.

[jsjtxietian]

Should we add a project setting for this? Maybe users may have trouble providing a custon CLI argument for godot, but they can open the project, do the setting and then restart the editor.

[timothyqiu]

Both a project setting (to always disable for the exported project) and an editor setting (to always disable for the editor) I think.

[timothyqiu]

Created a dedicated proposal for this: #8391