There is a checkbox in the Task Manager settings with the text "Mark applications that
play audio". Unchecking it does much more than no longer marking applications that play
audio though; it disables all PulseAudio-related features. This not only makes the label
inaccurate, but it also seems undesirable; a user could quite reasonably wish to disable
the audio indicators while still using PulseAudio-related functionality through the Task
Manager (e.g. muting an app from the context menu).
This patch makes the setting in question really and truly only show and hide the audio
indicator icon on the Task; other PA-related functionality is always loaded when
available.