helpers: add the filemanager backbone (1/3)

This commit series introduces a new feature to aero
control called 'Your Settings'. This will allow the
user to set any desired option for every tunable
on the system.

Starting with the backbone, a new generic simple file
manager is added. It uses the root-calls only as some
sort of fallback and displays each folder/file found
on the system.
It's designed to be generic to be added to any view,
so it can be reused in the feature.

Signed-off-by: Blechd0se <alex.christ@hotmail.de>
misc: add 'your settings' layout/logic (2/3)

As follow up to the previous commit this adds the
user interface for the new feature as well as the
basic logic operations inside the miscFragment.

Desired tunables can now be set via the new file
manager and modified with the normal PreferenceHandler.

The only missing thing is the set on boot feature,
which actually only requires a loop through the new
storage file and set the desired data since the other
things are already handled.

Signed-off-by: Blechd0se <alex.christ@hotmail.de>