Navigation Monitor - Navigation and Route Plotting Enhancements

## What happens now
Routes must be plotted in EDDI.

## What I'd like to happen
- [ ] Allow imports from Spansh .csv files

## How it can happen
Each Spansh plotter has its own unique return / .csv output.
The Navigation Monitor UI would need to have a button to import a .csv file. When clicked, it would open a window where the commander could select a .csv file and automatically recognize the plotter used to generate it (or select the Spansh plotter used to generate it from a dropdown list of supported plotters). We would need to be able to parse each of the supported formats.

## EDDI Version
4.0.3-b3