Convert chargeback assignment tabs to react

app/controllers/chargeback_assignment_controller.rb

@@ -15,6 +15,7 @@ def index
     assert_privileges("chargeback_assignments")
 
     @tabform = ChargebackRate::VALID_CB_RATE_TYPES.include?(params[:tab]) ? params[:tab] : "Compute"
+    tab_vars(@tabform)
     session[:changed] = @changed = false
     build_tabs
     set_form_vars
@@ -25,11 +26,17 @@ def change_tab
 
     clear_flash_msg
     @tabform = params['uib-tab']
+    tab_vars(params['uib-tab'])
     build_tabs
     set_form_vars
     render :action => "index"
   end
 
+  def tab_vars(current_tab)
+    @path = '/chargeback_assignment/change_tab/'
+    @current_tab = current_tab.to_s
+  end
+
   # AJAX driven routine to check for changes in ANY field on the form
   def form_field_changed
     assert_privileges("chargeback_assignments")