A few small optimizations and minor bugs

Maps are now loaded faster
The application now opens a bit faster, overall I have optimized the performance
Paths/plots can now be redrawn by key without having to move a point
Path Closed, Delete Path/Plot and Snap to Paths now have a key binding
In the settings dialog you can now scale the UI up to 120%.
In the settings dialog you can now adjust the camera speed via keys
The camera speed is now also dependent on the zoom level
Minor bugs and optimizations