Fix MAX_TRACE_TYPE to 13

Increase digit for show Q factor (use %.3f format)

main.c

@@ -1773,7 +1773,7 @@ VNA_SHELL_FUNCTION(cmd_trace)
     shell_printf("%d %s %s\r\n", t, type, channel);
     return;
   }
-#if MAX_TRACE_TYPE != 12
+#if MAX_TRACE_TYPE != 13
 #error "Trace type enum possibly changed, check cmd_trace function"
 #endif
   // enum TRC_LOGMAG, TRC_PHASE, TRC_DELAY, TRC_SMITH, TRC_POLAR, TRC_LINEAR, TRC_SWR, TRC_REAL, TRC_IMAG, TRC_R, TRC_X, TRC_Q, TRC_OFF

nanovna.h

@@ -228,7 +228,7 @@ extern const uint16_t numfont16x22[];
 #define S_OHM   "\036"
 
 // trace 
-#define MAX_TRACE_TYPE 12
+#define MAX_TRACE_TYPE 13
 enum trace_type {
   TRC_LOGMAG=0, TRC_PHASE, TRC_DELAY, TRC_SMITH, TRC_POLAR, TRC_LINEAR, TRC_SWR, TRC_REAL, TRC_IMAG, TRC_R, TRC_X, TRC_Q, TRC_OFF
 };

plot.c

@@ -665,7 +665,7 @@ trace_get_value_string(int t, char *buf, int len, float array[POINTS_COUNT][2],
     v = reactance(coeff);
     break;
   case TRC_Q:
-    format = "%.1f";
+    format = "%.3f";
     v = qualityfactor(coeff);
     break;
   case TRC_SMITH:
@@ -729,7 +729,7 @@ trace_get_value_string_delta(int t, char *buf, int len, float array[POINTS_COUNT
     v = reactance(coeff);
     break;
   case TRC_Q:
-    format = "%.1f";
+    format = "%.3f";
     v = qualityfactor(coeff);
     break;
   //case TRC_ADMIT: