* [ ] Investigate the current date picker (web)
* Begin of the insertion[x]End of the insertion Begin of the deletion [ ]End of the deletion Do a research on how to implement this with Flutter
* Begin of the insertion[x]End of the insertion Begin of the deletion [ ]End of the deletion Develop a spike Begin of the insertion
* [ ] Harmonize behavior with webEnd of the insertion

**Acceptance criteria**

* the date selection opens a full screen date selection dialogue.
* Range Mode (Show and select ranges similar to web / Example AirBNB)
* Single date mode (milestones)
* duration field is connected with date range selection