Fix #16911 breaks Charting using canvas

[kbenjamin]

dojox/charting/Element throws an error since the patch for #16911, at least when using canvas.

message: "Object #<Object> has no method 'setAttribute'" stack: "TypeError?: Object #<Object> has no method 'setAttribute' at declare.cleanGroup (​http://.../dojox/charting/Element.js:114:26)

This is the offending line:

this.group.rawNode.setAttribute(key, this.renderingOptions[key]);

Under canvas, rawNode has no setAttribute method.

[bill]

Assigning to cjolif preliminarily since he closed #16911.

[Christophe Jolif <cjolif@…>]

In 2ae8926b49368ccd3265a27eba8b1d6401336ae9/dojox:

Error: Processor CommitTicketReference failed

Unsupported version control system "git": Can't find an appropriate component, maybe the corresponding plugin was not enabled?