Incorrect dropdown style when Bootstrap 4 version is not auto detected since 1.13.13

[rjaros]

When Bootstrap 4 version is not auto detected and is set manually with:

$.fn.selectpicker.Constructor.BootstrapVersion = '4';

the dropdown style is broken, probably because of this change: 8698d1b

version.major is still '3' when the default element template is generated.

[ShirleySunCN]

@caseyjhol I made some adjustment in my project to workaround this issue, I would like to ensure this is ok, please help to review it.
And hope for the next release, so great extension.

  .bootstrap-select > .btn{
    border: 1px solid #ced4da;
    background-color: white;
    width: 100%;
  }

  .bootstrap-select > .btn > div{
    float: left;
    width: 90%;
    text-align: left;
  }

  .bootstrap-select > .selectpicker {
    display: none;
  }

  .bootstrap-select > .dropdown-menu {
    padding: 0;
    max-height: 230px;
  }

  .bootstrap-select > .dropdown-menu > .inner > .dropdown-menu{
    top: 0;
    position: relative;
    width: 100%;
  }

Bug screen capture:

After modified the style:

[rjaros]

To workaround this issue I'm inserting this small code fragment before loading bootstrap-select.js:

if ($.fn.dropdown === undefined) { $.fn.dropdown={'Constructor' : {'VERSION' : '4.0.0'}}; };

[ShirleySunCN]

@raido wow, thank you so much!

[raido]

I am not sure I am tagged here correctly :).

[rjaros]

Surely not :-) You are just first in github autocomplete list when someone writes @r ;-)

[caseyjhol]

Released in v1.13.17!