Expose TrackPoint settings if available

[wpkelso]

Problem

There is currently no way to modify trackpoint settings from the system settings when installed on a ThinkPad right now. This means if a user wants to change sensitivity, enable, disable, etc. the trackpoint, they have to go into dconf

Proposal

Detect and expose trackpoint settings when running on a ThinkPad or other device with a trackpoint.

Alternatively, switch the Mouse portion of the settings to refer to the trackpoint when it's the only mouse detected.

Prior Art (Optional)

[danirabbit]

So there is a /org/gnome/desktop/peripherals/pointingstick/ path in dconf (as well as /org/gnome/desktop/peripherals/trackball/). I wonder if those settings are for TrackPoint (and we probably can't use that name because of trademark)? can you test this? It doesn't look like it contains an option to disable the pointing stick

[wpkelso]

So there is a /org/gnome/desktop/peripherals/pointingstick/ path in dconf

Modifying the acceleration setting under that path does appear to affect the pointing stick (I hate that name, but I don't have a better suggestion right now 😢 --edit: looks like that is the common name...), and is independent of the acceleration selection under mouse settings.

(as well as /org/gnome/desktop/peripherals/trackball/).

I can check this too later, I don't have my trackball mouse on me at the moment.