Tests that elements panel shows proper inline style locations in the sidebar panel.

[expanded] 
element.style { ()
    display: none;

[expanded] 
.foo { (styles-sour…lper.html:4 -> styles-source-lines-inline-helper.html:4:7)
    color: blue;

[expanded] 
div { (user agent stylesheet)
/-- overloaded --/     display: block;
    unicode-bidi: isolate;