IE Multi Dropdown Error - Invalid attribute name character

[tbob18]

I noticed this error caused by double quotes in the following file:

https://github.com/Fabrik/fabrik/blob/master/plugins/fabrik_element/dropdown/layouts/fabrik-element-dropdown-form.php

Changing to following line fixed it and didn't seem to cause any issues otherwise.:

$multisize = $d->multisize === '' ? '' : 'size="' . $d->multisize . '""';
to:
$multisize = $d->multisize === '' ? '' : 'size="' . $d->multisize . '"';

[Sophist-UK]

@tbob18 - Good call - can you please submit a Pull Request with this change. With something this simple you can probably do it all here on Github easily enough.