Added option to append a string to the source's ID and set the ID attribute on the element

Author: mat21psu2

js/bootstrap-combobox.js

@@ -97,6 +97,9 @@
 
   , transferAttributes: function() {
     this.options.placeholder = this.$source.attr('data-placeholder') || this.options.placeholder
+    if(this.options.appendId !== "undefined") {
+    	this.$element.attr('id', this.$source.attr('id') + this.options.appendId);	
+    }
     this.$element.attr('placeholder', this.options.placeholder)
     this.$target.prop('name', this.$source.prop('name'))
     this.$target.val(this.$source.val())