Don't count duplicated queries on elements not attached to DOM

[gmetais]

Hi there!

Some DOM queries are counted as duplicated but aren't. Example:

var detachedDiv1 = document.createElement('div');
var detachedDiv2 = document.createElement('div');

detachedDiv1.getElementsByTagName('a');
detachedDiv2.getElementsByTagName('a');// should not be counted as duplicated query

Currently, they are counted as duplicated and this is the offender:
* tag name "a" (in div): 2 queries

Same thing with elements inside document fragments. While it's sometimes true, we can't be sure the browser is running the query inside the same document fragment.