Handle options with new plural syntax

[yoavf]

This prevents the options object from being ignored with the "new" plural syntax. Example string:

this.translate(
                'Registering this domain for a company? + Add Organization Name',
                'Registering these domains for a company? + Add Organization Name',
                {
                    context: 'Domain contact information page',
                    comment: 'Count specifies the number of domain registrations',
                    count: 5
                }

Without this patch, the context and comment are ignored in the output.

[Tug]

LGTM 👍