Crosshair mount is incorrect

[phet-steele]

Look at the little rectangle that connects the crosshair to the body. In published:

But on master and in phetsims/qa/issues/37, it's a circle:

The mount is correct once it is dragged out from the toolbox. Seen on macOs 10.12.6 Chrome.

[jonathanolson]

It looks like this may have been purposely added in f412cc0#diff-9106056b55c9f988721c00e7e8a04136 (would be hard to accidentally add two different corner radii parameters without meaning to?)

Is it for-sure a bug?

[phet-steele]

Let's investigate!

[phet-steele]

@jonathanolson it is not supposed to be there. I can't find documentation on github and @arouinfar also said it "doesn't need to be a dot".

[jonathanolson]

Ok, should be fixed now.

[phet-steele]

Beautiful.