Add hover text descriptions to top row of status information on current vehicle

[Susurrus]

The top row displays the current vehicle along with some of its status information but it isn't always clear what this information is. For example there is a distance shown to the far right that I assume is the total distance traveled by the vehicle for this run. It'd be nice if hovering over that with the mouse would provide that description. A description would also be nice for the 3 text fields displayed to the right of the vehicle name which detail the vehicle's status and mode as it isn't always clear what these single-word descriptions are supposed to mean unless you're quite familiar with MAVLink.

Another suggestion would be to remove the percentage indicator from the battery charge level display and move the voltage level into that bar. That helps to show that these two things are related and reduces the amount of space necessary for displaying it.

[Susurrus]

Attempted to fix this issue in my fork: Susurrus/qgroundcontrol@6dbf6dab38fdf27347f1a7a565d54995265b4cef

[LorenzMeier]

Is this merged or not?

[Susurrus]

Been fixed for a while now.