Bidirectional text improvements (#4541)

* Add support for \dir pragma

* Add "dir" attribute to reveal, edit, edit-text and edit-codemirror widgets

* Add  $:/config/DefaultTextDirection hidden setting

* Revert accidentally commited test data

This reverts some of commit b83c1d160f.

* Remove Codemirror plugin from Prerelease

Makes it easier to test things

* Fix framed text editor directionality in Firefox

* Add direction attribute for edit body template

* Missed closing brace

* Add docs for \dir pragma

* Templates should set text direction from a variable, not a transclusion

* Updates to framed.js in the light of PRs that have been merged since this

* Restore whitespace trim

* Docs dates

* Fix typo

* Clarify docs

plugins/tiddlywiki/codemirror/engine.js

@@ -109,6 +109,9 @@ function CodeMirrorEngine(options) {
 	if(this.widget.editTabIndex) {
 		config["tabindex"] = this.widget.editTabIndex;
 	}
+	if(this.widget.editDir) {
+		config.direction = this.widget.editDir;
+	}
 	config.editWidget = this.widget;
 	// Create the CodeMirror instance
 	this.cm = window.CodeMirror(function(cmDomNode) {