We will have problems with: 

* paranja (z-index:99) 
  https://github.com/yandex-ui/nanoislands/blob/master/blocks/paranja/paranja.styl#L2

* modal popups (z-index:100)
  https://github.com/yandex-ui/nanoislands/blob/master/blocks/popup/popup.styl#L2