Enable reordering in CLI argument list

Enables drag and drop reordering within the arguments list, for more convenient editing of the list in cases where the ordering matters, such as when passing arguments that take their own parameters. One example would be --files-from.

ResticScheduler/EditableListView.swift

@@ -14,7 +14,7 @@ struct EditableListView: View {
 
   var body: some View {
     ScrollViewReader { proxy in
-      List($editableList.list, selection: $editableList.selection) { item in
+      List($editableList.list, editActions: .move, selection: $editableList.selection) { item in
         TextField("", text: item.value)
           .font(.callout)
           .listRowInsets(.init())