gui: Display folder name in modal (fixes #5380) (#6407)

gui/default/syncthing/folder/editFolderModalView.html

@@ -1,4 +1,4 @@
-<modal id="editFolder" status="default" icon="{{editingExisting ? 'fas fa-pencil-alt' : 'fas fa-folder'}}" heading="{{editingExisting ? 'Edit Folder' : 'Add Folder' | translate}}" large="yes" closeable="yes">
+<modal id="editFolder" status="default" icon="{{editingExisting ? 'fas fa-pencil-alt' : 'fas fa-folder'}}" heading="{{editingExisting ? 'Edit Folder' : 'Add Folder' | translate}} ({{folderLabel(currentFolder.id)}})" large="yes" closeable="yes">
   <div class="modal-body">
     <form role="form" name="folderEditor">
       <ul class="nav nav-tabs" ng-init="loadFormIntoScope(folderEditor)">