In 5.0.12-beta, if you change the current language setting then the
current sidebar tab setting is lost. This was because the qualified
title generated for the tabs was incorporating the current language
title, by virtue of a trick used in the PageTemplate to set the
“languageTitle” variable to a field of the current language plugin.
This trick left the current tiddler set to the current language, and
this current tiddler was still in force for the transclusion of the
page template segments.
By rearranging the `[all[]]` operator we are able to ensure that shadow
tiddlers get processed before ordinary tiddlers. This makes it easier
to create custom stylesheets that override the core.
We get a significant speed improvement of >10% by rearranging filter
operators to bring to the front the operators likely to reduce the size
working list.
Now we reserve the `title` class for the tiddler title span itself, and
`titlebar` for the previous purpose of identifying the div containing
the title and the toolbar buttons
Templates are the low-level bits and pieces that allow TW5 to generate
HTML and CSS renderings of tiddlers. The UI folder contains the
user-visible UI of TW5
