Fix the browser node and ensure it doesn't colour the informant output
* Companion for Substrate #6269 (nested storage tx) * Adjust to PR changes * Bump to newest substrate * Bump spec * Switch branch * Remove redundant informant_prefix * Fix collator tests * Update branch * Revert "Switch branch" This reverts commit bcce560c51fbc9db604cf3b0f615bfd21419f87d. Co-authored-by: Alexander Theißen <alexander.theissen@parity.io>