Update dropdown class

doccano/app/server/templates/annotation.html

@@ -41,7 +41,7 @@
             </div>
             
             <div class="control">
-                <div class="dropdown is-active">
+                <div class="dropdown is-hoverable">
                     <div class="dropdown-trigger">
                         <button class="button" aria-haspopup="true" aria-controls="dropdown-menu" style="border-left:none">
                             <span class="icon">

doccano/app/server/views.py

@@ -74,7 +74,7 @@ class ProgressAPI(View):
         project = Project.objects.get(id=project_id)
         docs = Document.objects.filter(project=project)
         total = docs.count()
-        remaining = docs.filter(annotation__isnull=True).count()
+        remaining = docs.filter(annotations__isnull=True).count()
 
         return JsonResponse({'total': total, 'remaining': remaining})