Minor changes on Section 9.3.1 Application Function

This section becomes 9.3.2 Application Function if the proposed reordering is accepted

For better readability:

from "...performed by an application component." to "...performed by an application internal active structure element."
from "...describes the internal behavior of an application component." to "...describes the internal behavior of an application internal active structure element but does not imply any sequence of actions like application processes do; for the user of an application active structure element that performs an application function, this function is invisible.
from "If this behavior is exposed externally, this is done through one or more services." to "If this behavior is exposed externally, this is done through one or more application services."
from "Application services of other application functions and technology services may serve an application function." to "Business, application, and technology services may serve an application function."
from "An application function may access data objects." to "An application function may access application passive structure elements."
from "An application component may be assigned to an application function (which means that the application component performs the application function)." to "An application internal active structure element may be assigned to an application function (which means that the internal active structure element performs the application function)."