[explorer/nodelink][s+]: cursor to hover on dots and labels, add hover info and click support on label (events on labels are a bit of a 'trick' using obj.events('all')).
[explorer/nodelink][s+]: cursor to hover on dots and labels, add hover info and click support on label (events on labels are a bit of a 'trick' using obj.events('all')).

RCGTDev/openspendingjs,openspending/openspendingjs,RCGTDev/openspendingjs,openspending/openspendingjs-old,openspending/openspendingjs,openspending/openspendingjs,openspending/openspendingjs-old,RCGTDev/openspendingjs,openspending/openspendingjs-old,RCGTDev/openspendingjs,openspending/openspendingjs,openspending/openspendingjs-old