Store if brownout boot

Author: tyeth

src/Wippersnapper.cpp

@@ -2721,6 +2721,7 @@ void print_reset_reason(int reason) {
     break; /**<14, for APP CPU, reseted by PRO CPU*/
   case 15:
     WS_DEBUG_PRINTLN("RTCWDT_BROWN_OUT_RESET");
+    WS.brownOutCausedReset = true;
     break; /**<15, Reset when the vdd voltage is not stable*/
   case 16:
     WS_DEBUG_PRINTLN("RTCWDT_RTC_RESET");

src/Wippersnapper.h

@@ -254,9 +254,10 @@ class Wippersnapper {
 
   void provision();
 
-  bool lockStatusNeoPixel; ///< True if status LED is using the status neopixel
-  bool lockStatusDotStar;  ///< True if status LED is using the status dotstar
-  bool lockStatusLED;      ///< True if status LED is using the built-in LED
+  bool brownOutCausedReset = false; ///< True if low power reset - flash write issues
+  bool lockStatusNeoPixel;          ///< True if status LED is using the status neopixel
+  bool lockStatusDotStar;           ///< True if status LED is using the status dotstar
+  bool lockStatusLED;               ///< True if status LED is using the built-in LED
   float status_pixel_brightness =
       STATUS_PIXEL_BRIGHTNESS_DEFAULT; ///< Global status pixel's brightness
                                        ///< (from 0.0 to 1.0)