ConversationAction extends from ManagedAction
ConversationAction extends from ManagedAction

Also added some of the nifty autoconfiguration, such as $this->scoped,
to ConversationAction for increased code consistency.

charlycoste/StatusNet,gnusocial/mainline,chimo/social,faulteh/gnu-social,bankonme/gnu-social,gnusocial/mainline,chimo/social,furtherfield/gnu-social,chimo/social,charnimda/lgbtpzn-social,faulteh/gnu-social,charnimda/lgbtpzn-social,bankonme/gnu-social,faulteh/gnu-social,bankonme/gnu-social,charlycoste/StatusNet,foocorp/gnu-social,Piratas/tortuga,furtherfield/gnu-social,bankonme/gnu-social,gnusocial/mainline,furtherfield/gnu-social,foocorp/gnu-social,furtherfield/gnu-social,studio666/gnu-social,Piratas/tortuga,charnimda/lgbtpzn-social,studio666/gnu-social,studio666/gnu-social,eXcomm/gnu-social,gnusocial/mainline,eXcomm/gnu-social,eXcomm/gnu-social,Piratas/tortuga,eXcomm/gnu-social,faulteh/gnu-social,studio666/gnu-social,Piratas/tortuga,charlycoste/StatusNet,foocorp/gnu-social