html: update to uikit 2.26.2

provision: configurable DNS resolver in nginx config

index: don't reload the page via href="" on log out Looks like sometimes page reloads before client can disconnect properly.

index: check if roster has the item before removing it Sometimes we get events from contacts that are not in user's roster, trying to remove such contacts used to fail before this patch.

coffee: prefix user-triggered events The last straw was contact.on('remove'): remove is an internal Backbone event.

css: change default background color of remote video feeds to a darker gray

css: remove unused selector (hidden .calling-icon)

contacts: show new unauthorized contacts before than offline contacts

index: handling incoming "subscribed" and "unsubscribed" presences Currently the client can only comply with the request.

index: instead of resetting clientState, just reload the page Since log out is a <a href=""> "button" now, this code is only relevant on forced disconnects (server restarting, etc).