Fix most of the warnings. Remaining warnings come from nimble source code.

src/SystemTask/SystemMonitor.h

@@ -28,7 +28,7 @@ namespace Pinetime {
           if(xTaskGetTickCount() - lastTick > 10000) {
             NRF_LOG_INFO("---------------------------------------\nFree heap : %d", xPortGetFreeHeapSize());
             auto nb = uxTaskGetSystemState(tasksStatus, 10, NULL);
-            for (int i = 0; i < nb; i++) {
+            for (uint32_t i = 0; i < nb; i++) {
               NRF_LOG_INFO("Task [%s] - %d", tasksStatus[i].pcTaskName, tasksStatus[i].usStackHighWaterMark);
               if (tasksStatus[i].usStackHighWaterMark < 20)
                 NRF_LOG_INFO("WARNING!!! Task %s task is nearly full, only %dB available", tasksStatus[i].pcTaskName,

src/SystemTask/SystemTask.cpp

@@ -136,7 +136,6 @@ void SystemTask::Work() {
         case Messages::BleFirmwareUpdateFinished:
           doNotGoToSleep = false;
           xTimerStart(idleTimer, 0);
-          displayApp->PushMessage(Pinetime::Applications::DisplayApp::Messages::BleFirmwareUpdateFinished);
           if(bleController.State() == Pinetime::Controllers::Ble::FirmwareUpdateStates::Validated)
             NVIC_SystemReset();
           break;