New Compass ordering screen


While reviewing's @bugobliterator's compass ordering PR https://github.com/ArduPilot/ardupilot/pull/12629 I also tested MP's new screen. Overall it's a good looking screen but I quickly found several issues:

- does it really support 8 many rows? We don't have this many parameters in AP so I can't see how it could
- row highlighting:
- checking on the top "Set" column colours them all but it's not clear what this is for
- if the user can't modify individual fields, maybe it would be better to have the whole row light up
- why highlight a row at all?
- if multiple rows are selected, I might then expect the Up/Down buttons to affect both rows but it doesn't. I'd remove the ability to select multiple rows.
- a more common method is to have just two up/down buttons that affect the highlighted rows
- disconnecting the board and then pushing the up/down buttons causes a scary error message to appear
- reboot required message issues:
- moving away from the screen caused a "Reboot required" message to appear but the flight controller was disconnected. This message box appeared every time I moved off the screen no matter whether I answered "yes" or "no"
- reboot required appeared again when I clicked on the flight data screen even when I wasn't looking at the compass screen anymore and I'd already said "yes" once and the flight controller wasn't even connected
- I think it would be best to get rid of this pop-up completely and instead add a "Reboot" button below the "Compass Priority" table. Perhaps change the colour of the button if the user changes the table in a way that means a reboot is required.
- similar to [this other issue re the HW ID page](https://github.com/ArduPilot/MissionPlanner/issues/2336), it would be nice to get rid of the "BUS_TYPE_" prefix for the values appearing in the "BusType" column
- "compass's" should be "compasses". Perhaps we should replace "moving around" with "reordering".

Locate the Compass ordering screen in Mission Planner and reproduce the reported selection, disconnected-board, reboot-message, BusType, and wording behaviors. Review the linked compass ordering PR and related HW ID issue for context; done means the screen's ordering controls, reboot handling, displayed values, and text behave consistently with the requested changes.

Written by the indexing model from the issue text.