Breezify Battery Monitor

- Batteries are now in a proper ScrollView since in Plasma 5 popups can not (yet?) be resized
- Get rid of that expanding thing for details, it was fancy and all in 4 but doesn't play well with 5
- Use ToolTip for battery details
- Remove redundant information (non-power supply display name is always vendor + model, no need to show these in the details again)
- Make icons medium size to be consistent with Plasma NM
- More refined spacing