*  (reports) fix incorrect cashflow balance

Fixing a small typo here where multiple transfers across different payees on the same day fail to be summed up resulting in significant balance errors.

* release notes

* Update 1518.md

Continuing on from #1139 this PR deletes all function that are not used
anywhere.

The next PR will include all the entire files that are unused & deleted.

*  (prettier) adding trailing commas

* More commas

* style: enforce ordering of imports

* style: sort imports in loot-core

* style: sort imports in desktop-client

* style: sort imports in loot-design

* style: manual fixes