Improve hide-in-shadow-dom scriptlet to support >>> and ExtCSS

[piquark6046]

AdguardTeam/AdguardFilters#195191

To improve targeting an element, I think that we need to support >>> syntax of trusted-click-element and Extended CSS to hide-in-shadow-dom scriptlet.

Screenshot

[AdamWr]

I think that for apps.microsoft.com case we can use rather safely a rule like this:

apps.microsoft.com#%#//scriptlet('hide-in-shadow-dom', 'buy-box[telemetry-area-id="CtaButton"][telemetry-data*="buttonType"][telemetry-data*="share"]')

It hides "Share" button (it seems that it's not displayed on Windows, so changing user-agent might be required) and it doesn't hide a download button.

But of course improving the scriptlet might be useful.