* Add string '.htm' to 'Saving with TiddlyIE'
* Change external links to match locale with wiki language
* Add instructions for use to 'Saving on Android'
* Change string in 'task'
* Change instructions for use in 'Saving on iPad/iPhone'
* Add newline to 'TiddlyDesktop Releases'
* Remove caption from 'Serving TW5 from Android'
* Change link to external in tiddlers which tagged 'Editions'
* Remove string 'index.html' from 'Some of the things you can do with TiddlyWiki'
* Change link 'TiddlyWiki Groups' to 'Forums' in tiddlers which tagged 'Community'
* Remove CamelCase link 'TiddlyWiki' from tiddlers tagged 'Community'
* Change string 'done' to 'Upgrade' in 'UpgradeMechanism'
* Change buttons to images in 'How to export tiddlers'
* Add images about buttons to tiddlers
* Add quotation mark to text 'edit' in 'Signing the Contributor License Agreement'
* Rename 'UsingSVG' to 'Using SVG'
* Change link 'TypedBlockWikiText' to 'Typed Blocks in WikiText' in 'Using SVG'
* Add tiddler 'Using Stamp'
* Add 'rel="noopener noreferrer"' to external links
* Add description about 'rel="noreferrer"' to 'HTML in WikiText'
* Add link of prerelease version about translators edition, and how to translate on Node.js, in 'Translate TiddlyWiki into your language'
* Change string 'dropdown' to 'tab' in 'Installing a plugin from the plugin library'
* Add download button to 'Empty Edition'
This is quite a big change: a new way to invoke action widgets.
The advantage is that it solves #2217 and #1564, a long running problem
that prevented us from adding action widgets to widgets that modify the
store.
This commit adds the new technique for the button and keyboard widgets,
but also extends the select widget to trigger action widgets for the
first time
