Imonomy network refactoring and adjustments

[SergeyBl]

Fixed problems after release of first version:

problem with access to top window context for getting page url.
other small adjustments in imonomy.js file.
disable imonomy external prefetch request.
imonomy.js refactoring

#13986

P.S. Haven't access to set up Issue category.
It should have ## Category:Ads