Use the built-in tabs macro for the tiddler info panel and the sidebar tabs

Now you can insert your own tabs, too - see the release note

core/ui/TiddlerInfo/Fields.tid

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+title: $:/core/ui/TiddlerInfo/Fields
+tags: $:/tags/TiddlerInfo
+caption: Fields
+
+<$transclude tiddler="$:/core/ui/TiddlerFields"/>

core/ui/TiddlerInfo/List.tid

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+title: $:/core/ui/TiddlerInfo/List
+tags: $:/tags/TiddlerInfo
+caption: List
+
+<$list filter="[list{!!title}]" itemClass="tw-menu-list-item" emptyMessage="This tiddler does not have a list" template="$:/core/ui/ListItemTemplate"/>

core/ui/TiddlerInfo/Listed.tid

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+title: $:/core/ui/TiddlerInfo/Listed
+tags: $:/tags/TiddlerInfo
+caption: Listed
+
+<$list filter="[is[current]listed[]!is[system]]" itemClass="tw-menu-list-item" emptyMessage="This tiddler is not listed by any others" template="$:/core/ui/ListItemTemplate"/>

core/ui/TiddlerInfo/References.tid

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+title: $:/core/ui/TiddlerInfo/References
+tags: $:/tags/TiddlerInfo
+caption: References
+
+<$list filter="[is[current]backlinks[]sort[title]]" emptyMessage="No tiddlers link to this one" template="$:/core/ui/ListItemTemplate">
+</$list>

core/ui/TiddlerInfo/Tagging.tid

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+title: $:/core/ui/TiddlerInfo/Tagging
+tags: $:/tags/TiddlerInfo
+caption: Tagging
+
+<$list filter="[is[current]tagging[]]" itemClass="tw-menu-list-item" emptyMessage="No tiddlers are tagged with this one" template="$:/core/ui/ListItemTemplate"/>