fixes #785

Using spring.boot.admin.ui.title/spring.boot.admin.ui.brand you can
customise the page title and logo/title shown in the navbar

closes #212

Add a page with extra button to trigger a heap dump.

closes #734

server.servlet.contextPath set

The caches.size metric is not available for every cache implementation.
If the metric is not available the ui should still show hits and misses.
This commit ignores errors for the cache size and will do no further
requests for this metric after an error occurred.

fixes #756

also fix table styling in httptraces, auditevents and sessions

fixes #728

closes #697

The system.load.average.1m metric is not available on all platforms.
Therefore we ignore errors from fetching it.

closes #697

unecessary scss sections removed
no type for errors props

closes #560