ui: joystick: Fix vertical spacing in the input mapping dialog

[rafaellehmkuhl]

Before:

After:

[rafaellehmkuhl]

@ES-Alexander can you approve this one?

[ES-Alexander]

Not sure why that went weird (it didn't look like that to start with), but the PR does seem to fix the issue, so approved 🤷‍♂️

That said, I think the whole column of stuff there would likely look better in the middle of the column of space:

And we may wish to unwrap the "MAVLink Manual Control" label into a single line.

[rafaellehmkuhl]

Not sure why that went weird (it didn't look like that to start with), but the PR does seem to fix the issue, so approved 🤷‍♂️

That said, I think the whole column of stuff there would likely look better in the middle of the column of space:

Agree. We could use some extra width for the entries indeed.

[ES-Alexander]

We could use some extra width for the entries indeed.

Hah! I was thinking of just horizontally centering the left column, but expanding the right column width (to reduce wrapping of the options) is likely a better idea - good suggestion.