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

app/helpers/categories_helper.rb

@@ -5,6 +5,24 @@ module CategoriesHelper
       color: Category::UNCATEGORIZED_COLOR
   end
 
+  def transfer_category
+    Category.new \
+      name: "⇄ Transfer",
+      color: Category::TRANSFER_COLOR
+  end
+
+  def payment_category
+    Category.new \
+      name: "→ Payment",
+      color: Category::PAYMENT_COLOR
+  end
+
+  def trade_category
+    Category.new \
+      name: "Trade",
+      color: Category::TRADE_COLOR
+  end
+
   def family_categories
     [ null_category ].concat(Current.family.categories.alphabetically)
   end