Fix MQTT config bugs (#7446)

* Fix mqtt config bugs

* Apply suggestion from @Copilot

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Add client notification

* Verbiage

* Update src/mqtt/MQTT.cpp

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update src/mqtt/MQTT.cpp

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update src/mqtt/MQTT.cpp

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update src/mqtt/MQTT.cpp

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Remove test that is no longer true

* This test no longer exists

* Fix client notification crap

* Suppress false positive

* Revert "Suppress false positive"

This reverts commit bead96eaee.

* Try macro exclusion

* Derp

* Fix

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Jason P <applewiz@mac.com>

src/modules/AdminModule.cpp

@@ -798,8 +798,11 @@ void AdminModule::handleSetConfig(const meshtastic_Config &c)
 
 bool AdminModule::handleSetModuleConfig(const meshtastic_ModuleConfig &c)
 {
-    if (!hasOpenEditTransaction)
+    // If we are in an open transaction or configuring MQTT, defer disabling Bluetooth
+    // Otherwise, disable Bluetooth to prevent the phone from interfering with the config
+    if (!hasOpenEditTransaction && c.which_payload_variant != meshtastic_ModuleConfig_mqtt_tag)
         disableBluetooth();
+
     switch (c.which_payload_variant) {
     case meshtastic_ModuleConfig_mqtt_tag:
 #if MESHTASTIC_EXCLUDE_MQTT
@@ -810,6 +813,8 @@ bool AdminModule::handleSetModuleConfig(const meshtastic_ModuleConfig &c)
         if (!MQTT::isValidConfig(c.payload_variant.mqtt)) {
             return false;
         }
+        // Disable Bluetooth to prevent interference during MQTT configuration
+        disableBluetooth();
         moduleConfig.has_mqtt = true;
         moduleConfig.mqtt = c.payload_variant.mqtt;
 #endif