typo, should fix #1095

[Carreau]

cancell -> cancel

was rising exception in JS console and not closing tooltip.

[minrk]

Thanks, good catch. I had to clean up the javascript a bit, because some of it was inappropriate.

You should never actually call the prototype functions, and never pass an object to its own methods, and (almost) never need to pass any of its attributes to its own methods.

That's like calling a method of a class rather than the method of an instance:

Cell.prototype.method(that)

should just be:

that.method()

It's like doing:

cell = Cell()
Class.method(cell)

instead of just:

cell.method()

See fbed9d1 for the relevant changes.

[Carreau]

indead, that seem obvious in OO programming, i'm just not used to JS....Thanks