fix : selectEdge was fired even if user clicked on a node
fix : selectEdge was fired even if user clicked on a node

 The selectEdge handler is now fired only if user clicked on an edge, in order to select it.
 It's not fired if the node are selected because there are connected to the selected node.

gpolyn/vis,felixhayashi/vis,marcortw/vis,ricky6982/vis,kamilik26/vis,blackslate/vis,nargetdev/vis,eflexsystems/vis,gpolyn/vis,marcortw/vis,ericvandever/vis,felixhayashi/vis,eyko/vis,yotamberk/vis,zallek/vis,yotamberk/vis,xchehub/vis,kamilik26/vis,drwebmaker/vis,pryzm0/vis,nargetdev/vis,pryzm0/vis,samyamirou/vis,sitexa/vis,xchehub/vis,Tooa/vis,eyko/vis,ericvandever/vis,chaoallsome/vis,bsnote/vis,chaoallsome/vis,samyamirou/vis,bsnote/vis,machinemetrics/vis,zallek/vis,sitexa/vis,drwebmaker/vis,Tooa/vis,eflexsystems/vis,machinemetrics/vis,ricky6982/vis,blackslate/vis