Significantly improved font code

include/dawn/display/gui/font.h

@@ -41,11 +41,7 @@ typedef struct {
 
 typedef struct {
   int32_t length;
-  int32_t realChars;
-  float lineHeight, spaceSize;
-} fonttextinfo_t;
-
-typedef struct {
+  int32_t realLength;
   float width, height, scale;
   stbtt_aligned_quad *quads;
-} fontmeasure_t;
+} fonttextinfo_t;