bug(web): (re-)allow to set default keyboard to 'off'

[ermshiperete]

Older Keyman versions allowed to set the default keyboard for a field to 'off', i.e. the system keyboard. Clicking in the field wouldn't show the OSK but would still show the Keyman button and allow to turn on a Keyman keyboard. See older versions of the Control-by-Control sample.

The way to do it was by passing the empty string for the keyboard and languageCode parameters:

keyman.setKeyboardForControl(document.f.subject, '', '');

With current Keyman versions this is no longer possible; the first keyboard added will be the default keyboard. This was always the behavior on touch-based devices.

It would be nice to re-implement this functionality.

[mcdurdin]

@jahorton FYI

I was not aware this was broken -- it is a pretty important use case for Keyman and this is a serious regression. I would like to get this resolved in v19 if possible.