Variant drop down should allow to not select any variant and modify message displayed under the variant select box

The variant drop down currently forces the selection of the first variant. It should be allowed to not select any variant. In that case the variantMacro should display the content whatever the variant selection is.

Currently the message is displaying if the current page is restricted to the current variant selected.

After discussion with Anca we decided to if the page is restricted or not and when it's restricted to list all variants it is restricted to.