refactor - various facts cleanups

Fixes #1131 - Minor inconsistency: "Destroy" and "Delete" button have same function and different names

Signed-off-by: Marcello de Sousa <foreman-dev@area151.com>

fixes #1084 - OpenSUSE / SLES deployment root password not working

New artwork

• dark top-bar
• moved the search box below the tabs line.
• improved the show host page
• added notifications
• Settings tab now changes title based on the active action
• lots of cleanups - fixes #1066, fixes #926, fixes #628 and many other minor changes...

refs #1067 Link to Foreman issue tracker opens in a new window

fixes #1085 - add default domain and subnet settings to hostgroups

fixes #1093 - undefined method

fixes #1097 - 500 ERROR could be generated when User.current is not set

refs #1067 - Error message should show trace too

fixes #1067 - Expose error messages in the web GUI