* Add join attribute to list widget
* Use new join attribute in HTML saving templates
This simplifies the logic involved in saving tiddlers in JSON format
into TW html files, and should also slightly speed up the saving process
depending on how often that list widget gets refreshed.
* Unit tests for list widget's new join attribute
* Add `<$list-join>` widget
Allows specifying complicated join text more easily than an attribute
* Add support for JSON-formatted tiddler store, and make it the default
The change to `getTiddlersAsJson()` is to allow experimentation
* Move JSON tiddlers into their own store area, and fix support for encrypted tiddlers
Also add a dummy old-style store area for backwards compatibility
The current arrangement is that JSON tiddlers will always override old-style tiddlers.
* Use the deserialiser mechanism to decode the content
* Refactor $:/core/modules/deserializers.js before we start extending it
Cleaning up the helper function names and ordering
* Drop support for the "systemArea" div
It was only used in really old v5.0.x
* Update deserializer to support JSON store format and add some tests
* Life UI restrictions on characters in fieldnames
* Add another test case
* Correct mis-merge
* Remove toLowerCase() methods applied to fieldnames
* Insert line breaks in output of getTiddlersAsJson (#5786)
Rather than have the entire store on one line, insert a line break
after each tiddler.
* Refactor #5786 for backwards compatibility
* Only read .tiddlywiki-tiddler-store blocks from script tags
Prompted by @simonbaird's comment here: https://github.com/Jermolene/TiddlyWiki5/pull/5708#discussion_r648833367
* Clean up escaping of unsafe script characters
It seems that escaping `<` is sufficient
* Add docs from @saqimtiaz
Thanks @saqimtiaz
* Docs tweaks
* Remove excess whitespace
Thanks @simonbaird
* Fix templates for lazy loading
* Remove obsolete item from release note
* Clean up whitespace
* Docs for the jsontiddler widget
* Fix whitespace
Fixes#5840
* Comments
* Fix newlines in JSON store area
* Remove obsolete docs change
Co-authored-by: Simon Baird <simon.baird@gmail.com>