Account namespace updates: part 6 (transactions) (#904)

* Move Transaction to Account namespace

* Fix improper routes, improve separation of concerns

* Replace account transactions list partial with view

* Remove logs

* Consolidate transaction views

* Remove unused code

* Transfer style tweaks

* Remove more unused code

* Add back totals by currency helper

test/models/account_test.rb

@@ -99,7 +99,7 @@ class AccountTest < ActiveSupport::TestCase
   end
 
   test "should destroy dependent transactions" do
-    assert_difference("Transaction.count", -@account.transactions.count) do
+    assert_difference("Account::Transaction.count", -@account.transactions.count) do
       @account.destroy
     end
   end