Popups don't work after redraw

[woodwards]

Love this package - thanks so much for this!

However I'm having some trouble with popups. The first time I addGlPolylines(... popup =TRUE) I get a nice popup showing the relevant row of data.

However If I remove the lines and plot some new ones, popups no longer work. I am reusing the same group id, it that the problem? What's the correct way to remove and redraw lines so that the popups work?

Another minor issue is that the map cursor remains as a hand when clicking on a line, where in leaflet it changes to a pointer, which is nicer for the user.

Thanks!

[trafficonese]

I think thats the same problem as #48.

I think the main problem is that the remove functions dont work correctly.