MQTT Details Went Missing

[rwarner]

Recently came back to my WallPanel and the details in Advanced -> MQTT are all blank/missing

[jonahshader]

This probably happened because the system was unresponsive either due to MQTT or AmpliPi being configured but disconnected. Should be fixed after #33 is implemented.

[jonahshader]

The nextion wall panels have an stm32 that runs display related logic and an esp32 that runs everything else, so when the system (esp32) is unresponsive you can still navigate through the UI but the text fields and UI elements won't populate/update.