More cleanup

nanovna.h

@@ -1218,10 +1218,7 @@ enum marker_smithvalue {
 typedef struct uistat {
   float  value; // for editing at numeric input area
   freq_t freq_value; // for editing frequencies that do not fit in float;
-  int8_t digit; /* 0~5 */
-  int8_t digit_mode;
   int8_t current_trace; /* 0..3 */
-//  uint32_t previous_value;
   uint8_t lever_mode;
   uint8_t marker_delta;
   uint8_t marker_noise;

ui.c

@@ -28,7 +28,6 @@
 #pragma GCC optimize ("Os")
 
 uistat_t uistat = {
- digit: 6,
  current_trace: 0,
  lever_mode: LM_MARKER,
  marker_delta: FALSE,

ui_sa.c

@@ -2995,14 +2995,6 @@ static void fetch_numeric_target(uint8_t mode)
     plot_printf(uistat.text, sizeof uistat.text, setting.frequency_var ? "%QHz" : " AUTO", setting.frequency_var);
     break;
   }
-  
-  {
-    freq_t x = uistat.value;
-    int n = 0;
-    for (; x >= 10 && n < 9; n++)
-      x /= 10;
-    uistat.digit = n;
-  }
 }
 
 static void