Fix cleaning of custom attrs when editing token

js/bootstrap-tokenfield.js

@@ -383,7 +383,7 @@
   , getInput: function() {
     return this.$input.val()
   }
-      
+
   , setInput: function (val) {
       if (this.$input.hasClass('tt-input')) {
           // Typeahead acts weird when simply setting input value to empty,
@@ -653,7 +653,13 @@
         return // No input, simply return
 
       var tokensBefore = this.getTokensList()
-      this.setTokens( this.$input.val(), true )
+      var tokenData = {
+          label: this.$input.val(),
+          value: this.$input.val()
+      }
+      if (this.$input.data('attrs') != null)
+          tokenData = $.extend({}, this.$input.data('attrs'), tokenData)
+      this.setTokens( [tokenData], true )
 
       if (tokensBefore == this.getTokensList() && this.$input.val().length)
         return false // No tokens were added, do nothing (prevent form submit)
@@ -790,6 +796,7 @@
       this.preventCreateTokens = true
 
       this.$input.val( attrs.value )
+                .data('attrs', attrs)
                 .select()
                 .data( 'edit', true )
                 .width( tokenWidth )
@@ -893,7 +900,7 @@
       else {
         //temporary reset width to minimal value to get proper results
         this.$input.width(this.options.minWidth);
-        
+
         var w = (this.textDirection === 'rtl')
               ? this.$input.offset().left + this.$input.outerWidth() - this.$wrapper.offset().left - parseInt(this.$wrapper.css('padding-left'), 10) - inputPadding - 1
               : this.$wrapper.offset().left + this.$wrapper.width() + parseInt(this.$wrapper.css('padding-left'), 10) - this.$input.offset().left - inputPadding;