Don't open up chosen on option keyup.
Don't open up chosen on option keyup.

When embedding chosen in a chrome extension, the keyboard shortcut
includes the option key. If a chosen instance happens to be focused at the
time, releasing the option key opens it, but shouldn't.

liorch88/chosen,philwolstenholme/chosen,M0nsterLabs/chosen,taracila/chosen,M0nsterLabs/chosen,M0nsterLabs/chosen,liorch88/chosen,philwolstenholme/chosen,liorch88/chosen,Moykn/chosen,Moykn/chosen,M0nsterLabs/chosen,philwolstenholme/chosen,MeteorAdminz/chosen,taracila/chosen,MeteorAdminz/chosen,Moykn/chosen,MeteorAdminz/chosen,taracila/chosen,taracila/chosen,liorch88/chosen,Moykn/chosen,philwolstenholme/chosen