FEATURE: Add more bulk dismiss buttons with confirmation (#29331)

When performing bulk dismissal in Unread and New views, the dismiss button stays at the top of the UI. Because of this we want to provide the dismiss action also in the "sticky" menu that's always in view, even when scrolling a long list of topics.

spec/system/page_objects/modals/topic_bulk_actions.rb

@@ -12,6 +12,10 @@ module PageObjects
         find("#bulk-topics-confirm").click
       end
 
+      def click_dismiss_confirm
+        find("#dismiss-read-confirm").click
+      end
+
       def click_silent
         find("#topic-bulk-action-options__silent").click
       end

spec/system/topic_bulk_select_spec.rb

@@ -24,6 +24,51 @@ describe "Topic bulk select", type: :system do
     expect(topic_bulk_actions_modal).to be_open
   end
 
+  context "when dismissing unread topics" do
+    fab!(:topic) { Fabricate(:topic, user: admin) }
+    fab!(:post1) { create_post(user: admin, topic: topic) }
+    fab!(:post2) { create_post(topic: topic) }
+
+    it "removes the topics from the list" do
+      sign_in(admin)
+      visit("/unread")
+
+      topic_list_header.click_bulk_select_button
+      expect(topic_list).to have_topic_checkbox(topic)
+
+      topic_list.click_topic_checkbox(topic)
+
+      topic_list_header.click_bulk_select_topics_dropdown
+      topic_list_header.click_bulk_button("dismiss-unread")
+
+      topic_bulk_actions_modal.click_dismiss_confirm
+
+      expect(page).to have_text(I18n.t("js.topics.none.unread"))
+    end
+  end
+
+  context "when dismissing new topics" do
+    fab!(:topic) { Fabricate(:topic, user: user) }
+    fab!(:post1) { create_post(user: user, topic: topic) }
+
+    it "removes the topics from the list" do
+      sign_in(admin)
+      visit("/new")
+
+      topic_list_header.click_bulk_select_button
+      expect(topic_list).to have_topic_checkbox(topic)
+
+      topic_list.click_topic_checkbox(topic)
+
+      topic_list_header.click_bulk_select_topics_dropdown
+      topic_list_header.click_bulk_button("dismiss-new")
+
+      topic_bulk_actions_modal.click_dismiss_confirm
+
+      expect(page).to have_text(I18n.t("js.topics.none.new"))
+    end
+  end
+
   context "when appending tags" do
     fab!(:tag1) { Fabricate(:tag) }
     fab!(:tag2) { Fabricate(:tag) }