'iconOptions' added - customize Icon element

[UnkyBadTouch]

Added the option 'iconOptions' so you can customize the icon element

i.e.

'icon' => 'fas fa-random',
'iconOptions' => [
	'data-custom' => 'custom data for icon element',
],

resulting in:

<i class="fas fa-random" data-custom="custom data for icon element"></i>