settings: Add PIN for another Microsoft mouse
settings: Ellipsise the labels in each row
settings: Ellipsise label in properties title

And add some padding on each side.
settings: Always ask before pairing

When a remote-initiated pairing comes in, ask the user if they
actually want to pair. It would usually be a device that was removed
manually, so there must be a reason why we didn't want to see it.
settings: Make test window the same width as settings
settings: Move discoverable label to top right

Instead of at the bottom, to make it clearer that the discoverable
status is dependent on the device list discovering new devices, eg.
that it goes away when the panel goes away.
settings: Remove "Now" from the visible label