Change fonts; make use of the new feature to allow fonts to be specified using property from dialog xml.
Ensure that all fonts are defined within the style.
1) The chat menu will now select the runway closest to the aircraft
when the aircraft is on the ground, or very low (< 100ft). This
handles the case where the user has selected a runway explicitly,
e.g. 01R for KSFO take-offs for noise abatement. My thanks for
AnMaster for pointing this out on IRC. Note that above 100 ft, the
wind-appropriate runway will still be used.
2) Change to keyboard description for the - key, as pointed out by
Melchior.
