Wireless Paper: Fix BLE after Lightsleep (#3629)

* NimBLE deinit for deep-sleep only

* Optionally disable blink during light-sleep

* Advised to revert "blink disable"
This reverts commit 66347ce19bb7e6ade64827a01b0ba834bff1e361.

src/nimble/NimbleBluetooth.cpp

@@ -112,12 +112,12 @@ void NimbleBluetooth::shutdown()
     NimBLEAdvertising *pAdvertising = NimBLEDevice::getAdvertising();
     pAdvertising->reset();
     pAdvertising->stop();
+}
 
-#if defined(HELTEC_WIRELESS_PAPER) || defined(HELTEC_WIRELESS_PAPER_V1_0)
-    // Saving of ~1mA
-    // Probably applicable to other ESP32 boards - unverified
+// Extra power-saving on some devices
+void NimbleBluetooth::deinit()
+{
     NimBLEDevice::deinit();
-#endif
 }
 
 bool NimbleBluetooth::isActive()

src/nimble/NimbleBluetooth.h

@@ -6,6 +6,7 @@ class NimbleBluetooth : BluetoothApi
   public:
     void setup();
     void shutdown();
+    void deinit();
     void clearBonds();
     bool isActive();
     bool isConnected();