As an application developer, I would like to set multiple custom icons and tooltips on one LabelImageElement.
User can set multiple icons and tooltips via Java API.
ZK-5213 Improve accessibility by add tooltips on icons
ZK-3636 Added simple support for stacked font awesome icons
ZK-5663 a button with stacking icon is much bigger than the default one
ZK-5502 Allow users to customize tooltip on the icon