restore display and radio poweroff in ui

examples/companion_radio/ui-new/UITask.cpp

@@ -697,6 +697,9 @@ void UITask::shutdown(bool restart){
   if (restart) {
     _board->reboot();
   } else {
+    // still necessary until all boards are refactored to use poweroff
+    _display->turnOff();
+    radio_driver.powerOff();
     // Power off board including radio, display, GPS and components
     _board->powerOff();
   }

examples/companion_radio/ui-orig/UITask.cpp

@@ -307,6 +307,8 @@ void UITask::shutdown(bool restart){
   if (restart) {
     _board->reboot();
   } else {
+    _display->turnOff();
+    radio_driver.powerOff();
     // Power off board including radio, display, GPS and components
     _board->powerOff();
   }

examples/companion_radio/ui-tiny/UITask.cpp

@@ -566,6 +566,8 @@ void UITask::shutdown(bool restart){
   if (restart) {
     _board->reboot();
   } else {
+    _display->turnOff();
+    radio_driver.powerOff();
     // Power off board including radio, display, GPS and components
     _board->powerOff();
   }