Form: return scalar for single checkbox

[bill]

Currently the form widget always treats checkboxes as arrays, even when there's only a single checkbox. For example, in a form like:

<form dojoType=dijit.form.Form>
   <dojoType=dijit.form.Checkbox name=myCheckbox>
</form>

Then Form.getValue() will return {myCheckbox: ["on"]} or {myCheckbox: []} rather than the simpler {myCheckbox: "on"} or {} .

See also the code added for #8426. Checkboxes have a special code path but maybe after this change they can share the code for that ticket.

[sunxcint]

patch for dijit/form/_FormMixin.js

[sunxcint]

patch for test cases

[sunxcint]

For the form in the ticket description, Form.getValue() will return {myCheckbox: "on"} or {myCheckBox: null} .

[dylan]

Very outdated patch unfortunately, but should probably be considered for 1.12.

[dylan]

Ticket planning... move current 1.13 tickets out to 1.15 to make it easier to move tickets into the 1.13 milestone.