Update ajaxSelectPicker.js
Update ajaxSelectPicker.js

Included option to "mixWithCurrents". This retains currently selected options and appends any new results to them.
truckingsim/Ajax-Bootstrap-Select,maxvyaznikov/Ajax-Bootstrap-Select,markcarver/Ajax-Bootstrap-Select,Leoz83/Ajax-Bootstrap-Select,maxvyaznikov/Ajax-Bootstrap-Select,maxvyaznikov/Ajax-Bootstrap-Select,markcarver/Ajax-Bootstrap-Select,truckingsim/Ajax-Bootstrap-Select,Leoz83/Ajax-Bootstrap-Select,Leoz83/Ajax-Bootstrap-Select,truckingsim/Ajax-Bootstrap-Select,markcarver/Ajax-Bootstrap-Select