I couldn’t find any request to this, only a dead link to GitHub.
Custom fields, like the current one existing in InvoicePlane currently could also be extended to a “Type” setting, where you can select for example the following types:
- Date (has a datepicker)
- Select (with predefined values)
Would be a great feature for the next big update for IP. If it was already requested, sorry, the link was dead nor could I find a clear anwer what you guys were thinking of it.