rose bush: view mode: prettify rose-conf
rose bush: view mode: prettify everything

Also display full file name.
Raise an exception if trying to launch sgc for unregistered suite.
Move gcontrol exception to cylc suite_engine_proc.
prettify.css: remove padding
Relocate suite not registered exception to cylc.py
Merge pull request #1021 from matthewrmshin/rose-bush-prettify

rose bush: view mode prettify
Merge pull request #1023 from arjclark/handle.gcylc-launch-fail

rose sgc: handle gcontrol fail to launch for non-registered suites