Disable the "set default channel" button if already on the default channel

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

@@ -78,6 +78,10 @@ data class Channel(
 
             return "#${name}-${suffix}"
         }
+
+    override fun equals(o: Any?): Boolean = (o is Channel)
+        && psk.toByteArray() contentEquals o.psk.toByteArray()
+        && name == o.name
 }
 
 fun xorHash(b: ByteArray) = b.fold(0, { acc, x -> acc xor (x.toInt() and 0xff) })

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

@@ -85,7 +85,7 @@ class ChannelFragment : ScreenFragment("Channel"), Logging {
 
         // Only let buttons work if we are connected to the radio
         binding.shareButton.isEnabled = connected
-        binding.resetButton.isEnabled = connected
+        binding.resetButton.isEnabled = connected && Channel.defaultChannel != channel
 
         binding.editableCheckbox.isChecked = false // start locked
         if (channel != null) {
@@ -185,7 +185,7 @@ class ChannelFragment : ScreenFragment("Channel"), Logging {
                 .setNeutralButton(R.string.cancel) { _, _ ->
                     setGUIfromModel() // throw away any edits
                 }
-                .setPositiveButton(getString(R.string.accept)) { _, _ ->
+                .setPositiveButton(R.string.apply) { _, _ ->
                     debug("Switching back to default channel")
                     installSettings(Channel.defaultChannel.settings)
                 }

app/src/main/res/values/strings.xml

@@ -101,4 +101,5 @@
     <string name="reset">Reset</string>
     <string name="are_you_shure_change_default">Are you sure you want to change to the default channel?</string>
     <string name="reset_to_defaults">Reset to defaults</string>
+    <string name="apply">Apply</string>
 </resources>