* Plugins tab in control panel display tabs using filter instead of hard coded list
* Update ControlPanelPlugins.tid
The two entries `[[$:/core/ui/ControlPanel/Plugins/Installed]] [[$:/core/ui/ControlPanel/Plugins/Add]]` were removed from list filed as per @Jermelon confirmation!
* Create SystemTag_ $__tags_ControlPanel_Plugins.tid
Update the SystemTags documentation tiddler
* 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>`