Corrected leveloffset error

nanovna.h

@@ -442,8 +442,8 @@ typedef struct config {
   uint32_t harmonic_freq_threshold;
 #endif
   uint16_t vbat_offset;
-  int16_t low_level_offset;
-  int16_t high_level_offset;
+  float low_level_offset;
+  float high_level_offset;
   uint32_t correction_frequency[CORRECTION_POINTS];
   float    correction_value[CORRECTION_POINTS];
   uint32_t deviceid;
@@ -453,7 +453,7 @@ typedef struct config {
 
 extern config_t config;
 //#define settingLevelOffset config.level_offset
-int get_level_offset(void);
+float get_level_offset(void);
 
 void set_trace_type(int t, int type);
 void set_trace_channel(int t, int channel);

sa_cmd.c

@@ -175,8 +175,8 @@ VNA_SHELL_FUNCTION(cmd_levelchange)
 VNA_SHELL_FUNCTION(cmd_leveloffset)
 {
   if (argc == 0) {
-    shell_printf("leveloffset low %.1f\r\n", (float) config.low_level_offset);
-    shell_printf("leveloffset high %.1f\r\n", (float)config.high_level_offset);
+    shell_printf("leveloffset low %.1f\r\n", config.low_level_offset);
+    shell_printf("leveloffset high %.1f\r\n", config.high_level_offset);
     return;
   } else if (argc == 2) {
     float v = my_atof(argv[1]);

sa_core.c

@@ -491,11 +491,12 @@ void set_actual_power(float o)              // Set peak level to known value
     config.low_level_offset = new_offset;
 #endif
   }
+  dirty = true;
   config_save();
   // dirty = true;             // No HW update required, only status panel refresh
 }
 
-int get_level_offset(void)
+float get_level_offset(void)
 {
   if (setting.mode == M_HIGH) {
     if (config.high_level_offset == 100)        // Offset of 100 means not calibrated