BURs: make rename command move aliases/implications.

Make the tag rename command also move any aliases or implications from
the old tag to the new tag. Previously only the create alias command
moved aliases and implications.

app/logical/tag_mover.rb

@@ -9,6 +9,8 @@ class TagMover
 
   def move!
     CurrentUser.scoped(user) do
+      move_aliases!
+      move_implications!
       move_cosplay_tag!
       move_tag_category!
       move_artist!
@@ -57,6 +59,22 @@ class TagMover
     end
   end
 
+  def move_aliases!
+    old_tag.consequent_aliases.each do |tag_alias|
+      tag_alias.update!(consequent_name: new_tag.name)
+    end
+  end
+
+  def move_implications!
+    old_tag.antecedent_implications.each do |tag_implication|
+      tag_implication.update!(antecedent_name: new_tag.name)
+    end
+
+    old_tag.consequent_implications.each do |tag_implication|
+      tag_implication.update!(consequent_name: new_tag.name)
+    end
+  end
+
   def move_cosplay_tag!
     old_cosplay_tag = "#{old_tag.name}_(cosplay)"
     new_cosplay_tag = "#{new_tag.name}_(cosplay)"