FEATURE: Introducing new UI for changing User's notification levels (#7248)

* FEATURE: Introducing new UI for tracking User's ignored or muted states

lib/guardian.rb

@@ -390,6 +390,17 @@ class Guardian
     UserExport.where(user_id: @user.id, created_at: (Time.zone.now.beginning_of_day..Time.zone.now.end_of_day)).count == 0
   end
 
+  def can_mute_user?(user_id)
+    can_mute_users? &&
+      @user.id != user_id &&
+      User.where(id: user_id, admin: false, moderator: false).exists?
+  end
+
+  def can_mute_users?
+    return false if anonymous?
+    @user.staff? || @user.trust_level >= TrustLevel.levels[:basic]
+  end
+
   def can_ignore_user?(user_id)
     can_ignore_users? && @user.id != user_id && User.where(id: user_id, admin: false, moderator: false).exists?
   end