* Added failing linked-list test for #7059
* Fixed linked-list remove bug #7059
* Added failing linked-list test for #7059
* Switched LinkedList to use Map
* Removed this.last from LinkedList
* Removed this.first from LinkedList
* Switching to deleting old LinkedList entries
* LinkedList rewritten to be better
* Using null as LinkList ends to reduce hashing
* Using adhoc map... cause it's better than ECMA6 Map
* compliance with TiddlyWiki coding conventions
* Made link-list tests confirm the prev links
Co-authored-by: btheado <brian.theado@gmail.com>