Transfer and Payment auto-matching, model and UI improvements (#1585)

* Transfer data model migration

* Transfers and payment modeling and UI improvements

* Fix CI

* Transfer matching flow

* Better UI for transfers

* Auto transfer matching, approve, reject flow

* Mark transfers created from form as confirmed

* Account filtering

* Excluded rejected transfers from calculations

* Calculation tweaks with transfer exclusions

* Clean up migration

config/locales/models/transfer/en.yml

@@ -0,0 +1,17 @@
+---
+en:
+  activerecord:
+    errors:
+      models:
+        transfer:
+          attributes:
+            base:
+              must_be_from_different_accounts: Transfer must have different accounts
+              must_be_within_date_range: Transfer transaction dates must be within
+                4 days of each other
+              must_have_opposite_amounts: Transfer transactions must have opposite
+                amounts
+              must_have_single_currency: Transfer must have a single currency
+  transfer:
+    name: Transfer to %{to_account}
+    payment_name: Payment to %{to_account}