The "Flight Time" window works with precise user input but rounds it for display

[DeltaV1ms]

When entering a flight time, the planner will happily accept user input with at least 2 decimal places. However, before displaying the user's input, the planner rounds the input to a single decimal place. This makes it more difficult for the user to determine the actual input and catch errors, and for faster transfer times the small difference can be significant.