Clear signal bars on BLE device disconnect

Display.h

@@ -309,6 +309,8 @@ void draw_battery_bars(int px, int py) {
 #define Q_SNR_MIN_BASE -9.0
 #define Q_SNR_MAX 6.0
 void draw_quality_bars(int px, int py) {
+  stat_area.fillRect(px, py, 13, 7, SSD1306_BLACK);
+  if (radio_online) {
     signed char t_snr = (signed int)last_snr_raw;
     int snr_int = (int)t_snr;
     float snr_min = Q_SNR_MIN_BASE-(int)lora_sf*Q_SNR_STEP;
@@ -318,7 +320,6 @@ void draw_quality_bars(int px, int py) {
     if (quality > 100.0) quality = 100.0;
     if (quality < 0.0) quality = 0.0;
 
-  stat_area.fillRect(px, py, 13, 7, SSD1306_BLACK);
     // Serial.printf("Last SNR: %.2f\n, quality: %.2f\n", snr, quality);
     if (quality > 0)  stat_area.drawLine(px+0*2, py+7, px+0*2, py+6, SSD1306_WHITE);
     if (quality > 15) stat_area.drawLine(px+1*2, py+7, px+1*2, py+5, SSD1306_WHITE);
@@ -328,11 +329,15 @@ void draw_quality_bars(int px, int py) {
     if (quality > 75) stat_area.drawLine(px+5*2, py+7, px+5*2, py+1, SSD1306_WHITE);
     if (quality > 90) stat_area.drawLine(px+6*2, py+7, px+6*2, py+0, SSD1306_WHITE);
   }
+}
 
 #define S_RSSI_MIN -135.0
 #define S_RSSI_MAX -75.0
 #define S_RSSI_SPAN (S_RSSI_MAX-S_RSSI_MIN)
 void draw_signal_bars(int px, int py) {
+  stat_area.fillRect(px, py, 13, 7, SSD1306_BLACK);
+
+  if (radio_online) {
     int rssi_val = last_rssi;
     if (rssi_val < S_RSSI_MIN) rssi_val = S_RSSI_MIN;
     if (rssi_val > S_RSSI_MAX) rssi_val = S_RSSI_MAX;
@@ -341,7 +346,6 @@ void draw_signal_bars(int px, int py) {
     if (signal > 100.0) signal = 100.0;
     if (signal < 0.0) signal = 0.0;
 
-  stat_area.fillRect(px, py, 13, 7, SSD1306_BLACK);
     // Serial.printf("Last SNR: %.2f\n, quality: %.2f\n", snr, quality);
     if (signal > 85) stat_area.drawLine(px+0*2, py+7, px+0*2, py+0, SSD1306_WHITE);
     if (signal > 72) stat_area.drawLine(px+1*2, py+7, px+1*2, py+1, SSD1306_WHITE);
@@ -351,6 +355,7 @@ void draw_signal_bars(int px, int py) {
     if (signal > 20) stat_area.drawLine(px+5*2, py+7, px+5*2, py+5, SSD1306_WHITE);
     if (signal > 7)  stat_area.drawLine(px+6*2, py+7, px+6*2, py+6, SSD1306_WHITE);
   }
+}
 
 #define WF_RSSI_MAX -60
 #define WF_RSSI_MIN -135
@@ -388,9 +393,9 @@ void draw_stat_area() {
     draw_lora_icon(45, 8);
     draw_mw_icon(45, 30);
     draw_battery_bars(4, 58);
-    if (radio_online) {
     draw_quality_bars(28, 56);
     draw_signal_bars(44, 56);
+    if (radio_online) {
       draw_waterfall(27, 4);
     }
   }