* Add tests for backlinks
* Add backlinks indexer
* Use backlinks indexer in getTiddlerBacklinks if available
* Extract link extraction into its own method
This way we can provide an arbitrary parse tree, rather than just a
title, which will allow us to compare lists of outgoing links between
versions of a single tiddler
* Use new extractLinks method in backlinks indexer
...rather than copy-pasting the implementation
* Remove ES6-isms
TiddlyWiki needs to work with browsers that only support ES5
* Fixes issue with #4504 and importvariable copying
ImportVariables widget was using $tw.utils.extend to copy the
variables from temporary set widgets into itself. However,
$tw.utils.extend does NOT behave like Object.assign. It not only
copies all self-owned variables over, but also all variables
in that object's prototype chain. This led to some redundant copying,
and a problem where some variables might show up more than once
(like transclusion).
Fixed now. importvariables widget does its own copying, since it
can't rely on $tw.utils.extend to do the right job, and it can't
count on Object.assign to be there.
* Added test to prevent reversion of #4504
* Slight corrections to new importvariables test
* Add support for a custom class to modal wrapper
As per https://github.com/Jermolene/TiddlyWiki5/issues/4485 add support for a custom class to modal wrapper, by means of a field in the modal tiddler. The class is added to the modal wrapper in addition to the default class, allowing for custom styling via css of any part of the modal.
* Remove redundant check for tiddler.
* Add "Gruvbox Dark" color palette
this adds the "gruvbox dark" color palette (https://github.com/morhetz/gruvbox) which is also available for highlight.js and codemirror
* add "credits" field
* change "credits" field to "license" field
* add class tc-edit-texteditor to type field, trim ...
... whitespace, make look consistent
* define width 20% for type input field
* add second nbsp; for consistency with type input
* Changed importVariable to store its ownvariables
Before, importVariables was creating a setWidget for every single variable it would find in its tiddlers, and it would create a long-ass call tree. Now, instead, it just accumulates the variables in itself.
* Can't use Object.assign
Learned the hardway while working on tw5-relink that Object.assign
doesn't exist in IE11. Using $tw.utils.extend instead.
* Retaining setWidget transclusion flexibility
* One more test to verify mixing sets and macros
This change means that the colour for the date on the new journal button icon will change according to the current colour palette, and simplifies things for #4379
