Now we have two disposition for web activity, they are "window" and "inline".
The difference of these two dispositions are:
System would closes/kills the activity once activity calls |activity.postError| or |activity.postResult|.
System won't close/kills the activity after it's finished its job.
UI layout position
On top of current active app or active activity.
Parallel to current active app or active activity.
Strongly connected. When one activity of the activity chain is killed, all the remaining shall be killed except the caller.
Weakly connected. When one activity of the activity chain is killed, we just remove the reference of each other.