Every 'refresh' appends a new span.check-mark

[lcampanari]

Hello! The method 'refresh' appends a new span.check-mark to every li.dropdown-menu > a when using the attribute multiple.

Steps to reproduce:

1. Set up a select using the multiple attribute;
2. Initialize bootstrap-select;
3. Count .bootstrap-select li:first-child > a > .check-mark
4. Refresh bootstrap-select;
5. Repeat 3.

Reduced test case: https://codepen.io/campanari/pen/OqvrRv?editors=1011

For now I modified the function Selectpicker.prototype.createLi as follows:

if ((that.options.showTick || that.multiple) && elementTemplates.a.getElementsByClassName('check-mark').length < 1) {
        checkMark = elementTemplates.span.cloneNode(false);
        checkMark.className = iconBase + ' ' + that.options.tickIcon + ' check-mark';
        elementTemplates.a.appendChild(checkMark);
      }

Would this solve this issue without causing any other problems?

Thanks!

[caseyjhol]

Good catch. That fix won't cause any issues. I'll work on something more robust and make it available in the next release.

[caseyjhol]

Released in v1.13.9!