It thereby reduces code complexity that would arise when setting
many variables using "<$set>".
```
\define helloworld() Hello world!
<$vars greeting="Hi" me={{!!title}} sentence=<<helloworld>>>
<<greeting>>! I am <<me>> and I say: <<sentence>>
</$vars>
```
How this Widget differs from the set widget:
* Variables may be created by using the "key=value" notation
that you already know from widgets like action-setfield.
* You cannot specify a fallback ("emptyValue")
* You cannot use a filter to produce a conditional variable assignement
Original discussion that led to the creation of this widget:
https://github.com/Jermolene/TiddlyWiki5/issues/1610
Otherwise, the `sameday` macro will default to `modified`. In case the user set `dateField:"created"` when calling `timeline`, the result will be inconsitent.
Allow widgets to choose not to propagate actions. This is important for
widgets that themselves trigger actions.
Note that this change will cause problems with any existing
5.1.8-prerelease plugins that call `invokeActions()`.
The tabindex attribute was being set to the string “undefined” if the
attribute was not specified. The fix is to only set the tabindex
attribute if the attribute was specified.
Give the toolbar buttons for control panel, advanced search and tag
manager the selected state when the corresponding tiddlers are open in
the story river.
They don’t get automatically decoded when the browser reads the
resulting HTML. So, instead, we’ll solve
1e9e1a1fdc260bd8a19fa5d244590dabb5dfd7f5 by switching to double quotes
for attribute values.
The trouble with tweaking the ViewBox was that the amount of the
adjustment is expressed in the coordinate system of the image, not the
coordinate system of the bitmap that is being rendered. That means that
the additional space doesn’t necessarily extend to the single physical
pixel needed to resolve the issue.
* Moved “add new plugin” into a modal wizard
* Adopt big friendly buttons
* Add plugin icons and readmes to “add new plugin” modal
* Use tabs for splitting plugins/themes/languages
* Consistent styling between the “add new plugin” modal and the
“installed plugins” control panel tab
* Behind the scenes, moved from addressing the library as
`recipes/defaults/tiddlers/<etc>` to `recipes/library/tiddlers<etc>`
This may cause backwards compatibility problems for people relying on
the block mode parsing, but it’s much better for the rest of us as it
avoids an unsightly paragraph tag
