refs #9312 Added option to skip background removal from monitors.
refs #9312 Added unit test for the option
refs #9312 Minor comments.
refs #9321 Added check for missing instrument components

(this will break parallel on Windows in ReleaseWithDebug mode, but no parallel is enabled anyway.
refs #9312 Add some Comments
refs #9312 Logging if no detector found.
Merge remote-tracking branch 'origin/bugfix/9312_backgroundNoMonitors'