Add scroll position return on select1. Add optgroup capability for s…

[Guy--L]

…electing and filtering.

[DeanMW]

Any update on this? I have a need for optgroups and I dont think hacking them in is the most elegant way :c

[ivannovak]

This pull request worked great, just needed to add double quotes in a few places to get OptGroup labels with spaces to work.

Lines 136 and 220

136

var grpin = list.find('optgroup[label="' + label + '"]');

220

var grpin = select.find('optgroup[label="' + label + '"]');