Improved responsiveness of the UI interface.

Now if the scan time is more than 100ms, a cycle is used in which you can interrupt the processing of user input

sa_core.c

@@ -1497,7 +1497,7 @@ float perform(bool break_on_operation, int i, uint32_t f, int tracking)     // M
  skip_LO_setting:                           // jump here if in zero span mode and all HW frequency setup is done.
 
 #ifdef __FAST_SWEEP__
-    if (i == 0 && setting.frequency_step == 0 && setting.trigger == T_AUTO && setting.spur == 0 && SI4432_step_delay == 0 && setting.repeat == 1 && setting.sweep_time_us < ONE_SECOND_TIME) {
+    if (i == 0 && setting.frequency_step == 0 && setting.trigger == T_AUTO && setting.spur == 0 && SI4432_step_delay == 0 && setting.repeat == 1 && setting.sweep_time_us < 100*ONE_MS_TIME) {
       // if ultra fast scanning is needed prefill the SI4432 RSSI read buffer
       SI4432_Fill(MODE_SELECT(setting.mode), 0);
     }