provision: update tasks to use more YAMLy syntax

css: bring back bottom margin for contact list

css: remove dividers between contacts

css: remove contact list margins (compensate with contact padding)

css: animate contact switching

index: expand, but also deduplicate existence checks for previous and contact

index: debug error stanzas in console

index: ignore messages of type 'error'

index: default message type is 'normal'

index: bjid variable is already defined, use it