try to notice when user wants to go back to default settings

app/src/main/java/com/geeksville/mesh/model/Channel.kt

@@ -19,19 +19,15 @@ data class Channel(
     val settings: ChannelProtos.ChannelSettings = ChannelProtos.ChannelSettings.getDefaultInstance()
 ) {
     companion object {
-        // Note: this string _SHOULD NOT BE LOCALIZED_ because it directly hashes to values used on the device for the default channel name.
-        // FIXME - make this work with new channel name system
-        const val defaultChannelName = "Default"
-
         // These bytes must match the well known and not secret bytes used the default channel AES128 key device code
         val channelDefaultKey = byteArrayOfInts(
             0xd4, 0xf1, 0xbb, 0x3a, 0x20, 0x29, 0x07, 0x59,
             0xf0, 0xbc, 0xff, 0xab, 0xcf, 0x4e, 0x69, 0xbf
         )
 
-        // Placeholder when emulating
-        val emulated = Channel(
-            ChannelProtos.ChannelSettings.newBuilder().setName(defaultChannelName)
+        // TH=he unsecured channel that devices ship with
+        val defaultChannel = Channel(
+            ChannelProtos.ChannelSettings.newBuilder()
                 .setModemConfig(ChannelProtos.ChannelSettings.ModemConfig.Bw125Cr45Sf128).build()
         )
     }

app/src/main/java/com/geeksville/mesh/model/ChannelSet.kt

@@ -16,11 +16,6 @@ data class ChannelSet(
 ) {
     companion object {
 
-        // Placeholder when emulating
-        val emulated = ChannelSet(
-            AppOnlyProtos.ChannelSet.newBuilder().addSettings(Channel.emulated.settings).build()
-        )
-
         const val prefix = "https://www.meshtastic.org/d/#"
 
         private const val base64Flags = Base64.URL_SAFE + Base64.NO_WRAP + Base64.NO_PADDING

app/src/main/java/com/geeksville/mesh/ui/ChannelFragment.kt

@@ -169,12 +169,12 @@ class ChannelFragment : ScreenFragment("Channel"), Logging {
                     .setPositiveButton(getString(R.string.accept)) { _, _ ->
                         // Generate a new channel with only the changes the user can change in the GUI
                         model.channels.value?.primaryChannel?.let { oldPrimary ->
-                            val newSettings = oldPrimary.settings.toBuilder()
+                            var newSettings = oldPrimary.settings.toBuilder()
                             newSettings.name = binding.channelNameEdit.text.toString().trim()
 
-                            // Generate a new AES256 key (for any channel not named Default)
+                            // Generate a new AES256 key unleess the user is trying to go back to stock
                             if (!newSettings.name.equals(
-                                    Channel.defaultChannelName,
+                                    Channel.defaultChannel.name,
                                     ignoreCase = true
                                 )
                             ) {
@@ -184,10 +184,8 @@ class ChannelFragment : ScreenFragment("Channel"), Logging {
                                 random.nextBytes(bytes)
                                 newSettings.psk = ByteString.copyFrom(bytes)
                             } else {
-                                debug("ASSIGNING NEW default AES128 KEY")
-                                newSettings.name =
-                                    Channel.defaultChannelName // Fix any case errors
-                                newSettings.psk = ByteString.copyFrom(Channel.channelDefaultKey)
+                                debug("Switching back to default channel")
+                                newSettings = Channel.defaultChannel.settings.toBuilder()
                             }
 
                             val selectedChannelOptionString =