fix javascript issue (links in settings not clickable)

load jqueryui before jquery.multiselect.min.js

fixes:
Uncaught TypeError: Object function (e,t){return new v.fn.init(e,t,n)} has no method 'widget' jquery.multiselect.min.js:20
Uncaught TypeError: Object [object Object] has no method 'multiselect' vacation_sieve.js:31