This patch uses the PowerManagerButton to implement the tray icon.
It doesn't do the show when (dis)charging stuff since it will
display different battery types now, however that can be added
back if desired.

Integrate Light Locker configuration into Xfce Power Manager. This
allows proper settings synchronization between the two applications
and eliminates some of the hackiness used in Light Locker Settings
to accomplish the same effect, and streamlines similar tools into
a single location. This depends on light-locker 1.5.1 configured
with the GSettings backend.

Signed-off-by: Eric Koegel <eric.koegel@gmail.com>

The blank timeout cannot be longer than the DPMS timeouts,
the DPMS timeouts cannot be shorter than the blank timeout
simply because blanking after the display is already suspended
doesn't make any sense (and vice versa).

in the settings dialog for consistency with other Xfce settings
dialogs.

Add information on 1.3.1 release and prepare for 1.3.2

Draw the progressbar indicating the load-status of the devices
with cairo, eradicating the need for an icon per load-status.
TODO: Add the same drawing routine for the devices tab in the
settings manager.

The new icons are more consistent (in color and style) with Gnome/Adwaita
and the new keyboard brightness icons.

There is no more reference to it in the code, hence it isn't
used anymore anywhere.

Max minutes was limited to 50.

Most parts in the power manager are named in different ways. Let's try
to find a more uniform naming scheme for consistency reasons. This commit
renames the UI widgets. It is only an internal change and does not
effect anything visible to the user.

While more complicated, this fixes the sliders having different length
and positions.

Users can still control the sleep mode via the hidden option dpms-sleep-mode ("Standby" or "Suspend")
The default value is "Suspend" (implicitely set in xfpm-dpms.c)

The exact intent of this feature is unclear, its implementation
unfinished.

Remove all related GUI widgets from the settings dialog.