This repository is for the ExtJS4 user extension featured on this post: http://www.sencha.com/forum/showthread.php?134751-Ext.ux.form.field.BoxSelect-Intuitive-Multi-Select-ComboBox
Thanks to all those out there in the community that have contributed their patches or bug reports.
Hosted on github at https://github.com/kveeiv/extjs-boxselect