Add rule actions to prepend/append to transaction notes. (#3215)

* Add rule action to append to transaction notes.

* add release note

* support prepending

* fix linter

* update release note

* fix typecheck error

* update VRT test code

* revising VRT code

* select by row

* fix missing delete button

* fix VRT tests

* fix linter

* empty commit for CI

* avoid 'undefined' appearing in notes

* fix linter