Add dropdown item to change fallback service

app/src/main/java/org/unifiedpush/distributor/sunup/activities/AppBarViewModel.kt

@@ -72,6 +72,10 @@ class AppBarViewModel(
         }
     }
 
+    fun toggleSetFallbackServiceDialog() {
+        migrationViewModel.toggleFallbackSelection()
+    }
+
     fun toggleMigrationDialog() {
         migrationViewModel.toggleMigrationSelection()
     }

app/src/main/java/org/unifiedpush/distributor/sunup/activities/ui/AppBarUi.kt

@@ -68,6 +68,9 @@ fun AppBarUi(appBarViewModel: AppBarViewModel) {
                 onToggleShowToasts = {
                     appBarViewModel.toggleShowToasts()
                 },
+                onSetFallbackService = {
+                    appBarViewModel.toggleSetFallbackServiceDialog()
+                },
                 onMigrateToDistrib = {
                     appBarViewModel.toggleMigrationDialog()
                 }
@@ -93,6 +96,7 @@ fun Dropdown(
     onDismiss: () -> Unit,
     onChangeServer: () -> Unit,
     onToggleShowToasts: () -> Unit,
+    onSetFallbackService: () -> Unit,
     onMigrateToDistrib: () -> Unit
 ) {
     DropdownMenu(
@@ -129,6 +133,17 @@ fun Dropdown(
                 }
             }
         )
+        DropdownMenuItem(
+            onClick = {
+                onSetFallbackService()
+                onDismiss()
+            },
+            text = {
+                Text(
+                    stringResource(LibR.string.dialog_fallback_title)
+                )
+            }
+        )
         DropdownMenuItem(
             onClick = {
                 onMigrateToDistrib()