Custom Reports Adjustments (#2659)

* monthly Spending

* Add Average

* notes

* title

* date filter

* TS fixes and hide average when no data

* fix average tooltip and relabel x-axis

* Wording/verbiage

* remove spending files

* adjustments

* reports.d revert

* revert filter changes

* adjust update filters

* notes

* remove old notes

* adjust style

* lint fixes