the "sliker__item--selected" class is optionnal. Without it, the slider will simply start at
the first sliker__item
Classical with "safeload"
"sliker--safeload" is an option that preserve the aspect of the slider before
to show the slider style in this short period of time before loading.
With customs icons
Bullets and arrows are customs.
The options are in the data-properties on the root of the slider
Sliker multi pics
With the "liquid" option at 0, the sliker__items don't thake the full with.
So, we need to set their width in css to see them.
IMPORTANT: a sliker without liquid should NOT use the "sliker--safeload" option.