Add some new battery sensors : energy_now, energy_full and power_now.
Summary:
Depending on hardware, Linux kernel exports battery state in
different files. Previously only charge_now, charge_full and current_now
were available in ksysguard. With this commit all are selectable.
While we have now screens with more than 1000 pixels height,
a percentage with 100 steps will show a ladder. This commit also
make the created graphs nicer by giving 1000 steps.
Reviewers: Plasma, davidedmundson, ahiemstra
Reviewed By: ahiemstra
Subscribers: anthonyfieroni, plasma-devel
Tags: Plasma
Differential Revision: https://phabricator.kde.org/D28127