fix some movement logic
don't render cm93 oulines for quilted mode
fix ownship large scale with opengl and without gps
fix issues with course up, zooming and movement
fix background region for rotated vector charts without opengl
fix ENC text rendering for opengl
use floating point coordinates to fix sub-pixel problems in overzoom, this fixes fbo panning problems, and round-errors causing smooth zooming to wobble
fix incorrect calculation and remove commented code
fix obvious bugs in txfGetStringMetrics