Today, we are only querying appropriate selectors when :hover or :active is selected in the sidebar. Element's state does not change and it is hard to master styles while in this mode.
Created attachment 104025 [details] Patch
Created attachment 104027 [details] Patch
Comment on attachment 104027 [details] Patch Inspector part looks good to me.
Comment on attachment 104027 [details] Patch r=me
Committed r93122: <http://trac.webkit.org/changeset/93122>