Keeps only the main debugbar functionality on iframes

[erikn69]

window.parent != window.top added to prevent infinite loops(SPA, Livewire, Hotwire #613 (comment))

Alternative to #452 (comment)

We needed a way to add them to the debugbar. (a bit like it happens with ajax+headers).
The debugbar is opened in the top frame, and when something happens inside the iframes, the changes are being added to the top-level debugbar.

Some iframes may be hidden or small, this PR propagates data from iframes to the top main debugbar and also it prevents size errors caused by small iframes(the inside smaller iframe change web storage like height, that affects the main debugbar)

Closes #614

[erikn69]

Tested on
Hotwire => #614 (comment)
Livewire => #613 (comment)