[skip ci] Use default button styles for .btn-secondary

app/assets/stylesheets/bootstrap_migration.scss

@@ -133,8 +133,3 @@ table {
     @extend .border-0;
   }
 }
-
-.btn-secondary {
-  // btn-default has been renamed btn-secondary; need to change all instances of btn-default
-  @include btn-default;
-}

app/assets/stylesheets/framework/buttons.scss

@@ -253,6 +253,11 @@
   }
 }
 
+.btn-secondary {
+  // btn-default has been renamed btn-secondary; need to change all instances of btn-default
+  @include btn-default;
+}
+
 .btn-terminal {
   svg {
     height: 14px;