Icon naming spec compliance, battery cleanup part 2.
Moving battery icons from actions to status:

* battery-discharging-000 -> battery-low
* battery-discharging-020 -> battery-caution
* battery-discharging-(040|060|080|100) -> battery-\1
* battery-charging-000 -> battery-charging-low
* battery-charging-020 -> battery-charging-caution
* battery-charging-(040|060|080|100) -> battery-charging-\1

battery-charging-100 is an intermediate solution and will probably be removed sometime, but you can keep using it in your code (although plain battery-charging is better).

This means that

1. we conform to the naming spec for battery icons, plus have a few additional but compatible ones.

2. if your battery daemon uses composite strings, like QString("battery") + charging_state + percentage and Pino didn't find those when grepping through KDE/, please drop me a note and let me look at the code so I can see how to best fix them.

3. KLaptopDaemon depends on battery icons with a #FFFFFF colored free space that is drawn blue according to the charging state. And that's a mess. Totally impossible to standardize on battery icons this way, somebody needs to fix that icon usage code.