* add stories for buttons and icons using wvui and mwui
* Update user link stories
* Add the vector-menu-dropdown-noicon class to more and
variants menu
* Fixes the language button story and simplifies its code.
* Updates Hooks::makeButtonIcon to Hooks::makeIcon which
reflects the method purpose more. It doesn't output button
classes.
Bug: T289514
Change-Id: Ifd750da0c0181ec56f39ff00d653e88bfc848038
jdlrobson