Autoclose dialogs when navigating away (#195)
Autoclose dialogs when navigating away (#195)

See bug report in #195.  This addresses both the reported bug ("Advanced Mailing
Options" dialog) and a similar bug ("Preview/Test" dialog).

veda-consulting/uk.co.vedaconsulting.mosaico,veda-consulting/uk.co.vedaconsulting.mosaico,veda-consulting/uk.co.vedaconsulting.mosaico,veda-consulting/uk.co.vedaconsulting.mosaico