Account:: namespace simplifications and cleanup (#2110)

* Flatten Holding model

* Flatten balance model

* Entries domain renames

* Fix valuations reference

* Fix trades stream

* Fix brakeman warnings

* Fix tests

* Replace existing entryable type references in DB

test/controllers/transactions/bulk_deletions_controller_test.rb

@@ -0,0 +1,24 @@
+require "test_helper"
+
+class Transactions::BulkDeletionsControllerTest < ActionDispatch::IntegrationTest
+  setup do
+    sign_in @user = users(:family_admin)
+    @entry = entries(:transaction)
+  end
+
+  test "bulk delete" do
+    transactions = @user.family.entries.transactions
+    delete_count = transactions.size
+
+    assert_difference([ "Transaction.count", "Entry.count" ], -delete_count) do
+      post transactions_bulk_deletion_url, params: {
+        bulk_delete: {
+          entry_ids: transactions.pluck(:id)
+        }
+      }
+    end
+
+    assert_redirected_to transactions_url
+    assert_equal "#{delete_count} transactions deleted", flash[:notice]
+  end
+end