Fix directions of drawing for symbols in map and radar mode

- X axis was reversed in map mode
- Home direction rotation was not corrected for the current heading
in radar mode

src/main/io/osd.c

@@ -947,7 +947,7 @@ static void osdDrawMap(int referenceHeading, uint8_t referenceSym, uint8_t cente
  int points = poiDistance / (float)(scale / charHeight);
 
  float pointsX = points * poiSin;
- int poiX = midX + roundf(pointsX / charWidth);
+ int poiX = midX - roundf(pointsX / charWidth);
  if (poiX < minX || poiX > maxX) {
  continue;
  }
@@ -1007,7 +1007,7 @@ static void osdDrawHomeMap(int referenceHeading, uint8_t referenceSym, uint16_t
 static void osdDrawRadar(uint16_t *drawn)
 {
  int16_t reference = DECIDEGREES_TO_DEGREES(osdGetHeading());
- int16_t poiDirection = osdGetHeadingAngle(GPS_directionToHome + 180);
+ int16_t poiDirection = osdGetHeadingAngle(GPS_directionToHome - osdGetHeading() + 180);
  osdDrawMap(reference, 0, SYM_ARROW_UP, GPS_distanceToHome, poiDirection, SYM_HOME, drawn);
 }