Strings from build.js are not localised

[ostasevych]

I found that the strings which are present in build.js file (and not available in template files) are not localised in l10n js files. Please, add them all:
In particular:
"Disable"
"Enable"
"Verify"
"Confirm"
"The gateway can send authentication to your Signal mobile and deskop app." <- without <L10n text="...>tag, so cannot be localised
"You are not using {displayName} for two-factor authentication at the moment."
"Enter your identification (e.g. phone number to start the verification):"
"Could not verify your code. Please try again."
"The {displayName} gateway is not configured."
"A confirmation code has been sent to {phone} via SMS. Please insert the code here:"