Button variation styles are not directly supported by Dropdown buttons

[4lejandrito]

Spec: https://lexicondesign.io/docs/patterns/buttons.html#variations.

At the moment style only support one of the main styles (primary or secondary). The variations can only be applied by manually adding the raw classes to the triggerClasses attribute:
triggerClasses = 'btn-outline-borderless'.

Here an example of my use case inside a jsp file:

<clay:dropdown-menu
    icon="share"
    style="secondary"
    triggerClasses="btn-outline-borderless"
    items="..."
/>

Thanks!

[carloslancha]

This was fixed in #874