1.27.6

[Commits to master since this release](https://github.com/gorhill/uBlock/compare/1.27.6...master)

To install the stable build:

- **Firefox**: Click [uBlock0_1.27.6.firefox.signed.xpi](https://addons.mozilla.org/firefox/downloads/file/3574596/ublock_origin-1.27.6-an+fx.xpi)
    - uBO works best on Firefox.
- **Chromium**: Install from the Chrome store (CWS): <https://chrome.google.com/webstore/detail/ublock-origin/cjpalhdlnbpafiamejdnhcphjbkeiagm>
    - For Chromium version 54 and older, it is necessary to enable "Experimental JavaScript" at `chrome://flags/#enable-javascript-harmony`.
- **Edge**: Install from Microsoft Store: <https://microsoftedge.microsoft.com/addons/detail/odfafepnkmbhccpbejgmiehpchacaeak>
    - The Microsoft Store version of uBO is published by [Nik Rolls](https://github.com/nikrolls/uBlock-Edge)
- **Opera**: Install from Opera addons: <https://addons.opera.com/en/extensions/details/ublock/>

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## Notable commits with no entry in issue tracker:

- [regression] [Fix computing the path of nested lists](https://github.com/gorhill/uBlock/commit/a5a447186b5a68ff606a6748ddc422e1bcbf91be)
- [Ensure either `.desktop` or `.mobile` class is set](https://github.com/gorhill/uBlock/commit/5229e0c81086fd7e89143511c540e64789b98aaa)