Register for ncurses mouse events at startup to avoid cursor flashing.

the cursor was flickering every time mouse events were turned on or off.

the only thing i can think of that this might affect, is the ability to select text from the terminal with the mouse. But that never works properly anyway.

EDIT: apparently there is an issue with terminals that send mouse movement events, so i also disabled those for now. The mouse movement reporting specifically can be reenabled as and when required.

Another solution would be to make mouse usage optional. But it would probably work fairly well to only turn positional events on when they were actually in use.