Button "Create New" next to dropdowns of existing entities.

[MinaDoncheva]

Is your feature request related to a problem? Please describe.
When relating entities we use dropdowns in creation process to choose the instance we want to relate our new entity to. However, sometimes we need to create a new record to that list and by now we must interrupt the creation process to add the needed entity.

Describe the solution you'd like
A feature for a "shortcut" to the creation form of a dependent entity instance would make the process smoother.

Describe alternatives you've considered
The dropdown to work as textbox as well so the user could just write what is needed and the application to require the rest of the needed fields later (after the creation form is submitted).

Additional context

The screenshots show the current state of the problem. Sales orders contain a client, however, the client we want to connect that order to could not be registered by now. An option to do so clicking a button "Add new" and filling the form as a dialog form would improve the workflow significantly.