Port signup to new layout

app/controllers/admin/base_controller.rb

@@ -2,7 +2,10 @@ class Admin::BaseController < ApplicationController
 
   before_action :authenticate_user!
   before_action :authorize_admin
+  before_action :set_context
 
-  layout "admin"
+  def set_context
+    @context = :admin
+  end
 
 end

app/controllers/invitations_controller.rb

@@ -2,8 +2,6 @@ class InvitationsController < ApplicationController
   before_action :require_user_signed_in, except: ["show"]
   before_action :require_user_signed_out, only: ["show"]
 
-  layout "signup", only: ["show"]
-
   # GET /invitations
   def index
     @invitations_unused = current_user.invitations.unused

app/controllers/signup_controller.rb

@@ -3,8 +3,7 @@ class SignupController < ApplicationController
   before_action :require_invitation
   before_action :set_invitation
   before_action :set_new_user, only: ["steps", "validate"]
-
-  layout "signup"
+  before_action :set_context
 
   def index
     @invited_by_name = @invitation.user.address
@@ -105,4 +104,8 @@ class SignupController < ApplicationController
       invitation: @invitation
     )
   end
+
+  def set_context
+    @context = :signup
+  end
 end