Fix escaped commas in uBO scriptlet parameters

[scripthunter7]

Escaped commas are highlighted incorrectly.

Example rule:

##+js(trusted-set-cookie, gravitoData, {"NonTCFVendors":[{"id":1\,"name":"Facebook"\,"consent":true}\,{"id":3\,"name":"Google"\,"consent":true}\,{"id":9\,"name":"Twitter"\,"consent":true}]}, 1year)

from https://github.com/uBlockOrigin/uAssets/blob/a7d6966930f7648d9cc5740f5b03fb05f86029d4/filters/annoyances-cookies.txt#L63

Show screenshot

Reported by @peace2000