* UI component registries initial implementation
This is an initial implementation of #1355.
It was simple enough to make to be proposed as
a PR already without waiting for remarks on the RFC.
The SitemapProvider for the `system:sitemap`
namespace as described in #1355 is not part of
this PR.
Signed-off-by: Yannick Schaus <github@schaus.net>
* Refactor dashboard tiles into core
Move the tile concept from the dashboard UI to the
org.openhab.core.ui bundle, and add a REST resource
(/rest/ui/tiles) to retrieve the list of tiles i.e.
registered UIs.
Signed-off-by: Yannick Schaus <github@schaus.net>