feat(bulk-report-replies): add feature with non-functional UI

This commit adds a new "bulk report replies" feature along with its UI.
The underlying logic will be implemented soon.

Bug: twpowertools:192
Change-Id: I6a6a636c7186485154c32dbbec001493b3b0458f
diff --git a/src/static/css/common/console.css b/src/static/css/common/console.css
index 68724b4..805e1e2 100644
--- a/src/static/css/common/console.css
+++ b/src/static/css/common/console.css
@@ -169,7 +169,7 @@
  * that case, only users who have enabled one of the specified features will
  * experience the breakage.
  **/
-body.TWPT-flattenthreads-enabled {
+body:is(.TWPT-flattenthreads-enabled, .TWPT-bulkreportreplies-enabled) {
   ec-thread sc-tailwind-thread-message-message-list sc-tailwind-thread-message-message-actions {
     display: flex;
     flex-direction: row;