feat: Add an option to disable endConversation button (#4352)

db/migrate/20220405092033_update_web_widget_feature_flags.rb

@@ -0,0 +1,16 @@
+class UpdateWebWidgetFeatureFlags < ActiveRecord::Migration[6.1]
+  def change
+    change_column_default(:channel_web_widgets, :feature_flags, from: 3, to: 7)
+
+    set_end_conversation_to_default
+  end
+
+  def set_end_conversation_to_default
+    ::Channel::WebWidget.find_in_batches do |widget_batch|
+      widget_batch.each do |widget|
+        widget.end_conversation = true
+        widget.save!
+      end
+    end
+  end
+end