Create a custom datatype that is radio/checkboxes with an automatic "other" option

[nonprofittechy]

The datatype: combobox is not accessible, and the UX isn't obvious to most users.

The alternative, managing two different variables, is clunky.

1. You need to remove the phantom "Other" option from a list of checkboxes.
2. You need to have some conditional logic to add the "other" variable
3. You need to manage adding the "other" item to the list if you want to display the checked items + the "other" choice.

Can also make a function to simplify this, but the custom datatype would make this a lot more accessible..

[nonprofittechy]

Here is the function that basically does the same task as the custom datatype would:

docassemble-ALToolbox/docassemble/ALToolbox/misc.py

Line 421 in 3c91f7b

def option_or_other(