* GreenField: Payment Requests CRUD
* fixes
* fix swagger
* fix swag
* rebase fixes
* Add new permissions for payment requests
* Adapt PR to archive
* fix tst
* add to contains policxy
* make decimals returned as string due to avoid shitty language parsing issues
* do not register decimal json converter as global
* fix cultureinfo for json covnerter
* pr changes
* add json convertet test
* fix json test
* fix rebase
* do not allow negative amounts for crowdfund and payment requests
* remove currency placeholder in payment requests
* Improve date picker ui
Clear button only appears when a value is set. If no value is set, display a placeholder indicating it. closes#625