This adds a new config option 'battery_tooltip' (enabled
by default), which can be used to enable a tooltip for
the battery widget providing details for all installed
batteries.
Currently all messages following the "another systray is running"
message are also printed in red. Fix this by reseting the color
at the end of the message.
Some notebooks, like the ThinkPad X240 and X250 have two batteries
installed. So far only one of the batteries have been checked by
the tint2 widget making it more or less useless on those systems.
After this patch tint2 will aggregate the data from all batteries
instead.
Sebastian Reichel