createSID(conf) {
		const v = this.state.values;
		const n = this.state.creates;
		let sid;

		do {
			sid = "new%06x".format(Math.random() * 0xFFFFFF);
		} while ((n[conf]?.[sid]) || (v[conf]?.[sid]));

		return sid;
	}
Generates a new, unique section ID for the given configuration.

Note that the generated ID is temporary, it will get replaced by an
identifier in the form `cfgXXXXXX` once the configuration is saved
by the remote `ubus` UCI api.

@param {string} conf
The configuration to generate the new section ID for.

@returns {string}
A newly generated, unique section ID in the form `newXXXXXX`
where `X` denotes a hexadecimal digit.