Add user information drop down to top right (#64)

Reviewed-on: #64

test/system/expenses_test.rb

@@ -47,7 +47,7 @@ class ExpensesTest < ApplicationSystemTestCase
 
   test "should destroy Expense" do
     visit expense_url(@expense)
-    click_on "Delete expense", match: :first
+    accept_prompt { click_on "Delete expense", match: :first }
 
     assert_text "Expense was successfully destroyed"
   end