Add "New Record" support to a combo box

[jsusen (Jindřich Sušeň)]

The mobile version of the new feature was not implemented yet. A new ticket has been created for it instead:

Implement Adding a New Record into Combobox on Mobile

Adding a new record in combobox using a special button was implemented for the desktop browser size. The mobile version of Origam still lacks this feature. The original post is here: