Now that there is a Link.mustache, I think other components like Button, Link should use the Icon template, and not include icon in the name, as its possible to have a link or button that doesnt use an icon as well.
Change-Id: I6d8a17dd956f09bb3df7a2503f55d255599874f8
Simplify the user links component
Introduce MenuListItem and IconLink components.
HTML changes:
* Logout, login and account links are now wrapped in a ul and li tag
instead of a DIV for consistent with other menus (this occurs due
to use of MenuContents). Code reviewer can see tests
for an understanding of how the template data and markup has changed.
VISUAL CHANGE:
* Increased margins in user links menu relating to change from DIV to
UL / LI tags.
Bug: T320927
Change-Id: Ia24be48105e1ff85da227883abb5dddb3d54388d
