Add --hide-unmonitored flag to ncurses frontend #184

Job	Run time
determine-distros	3s
Generate Debian packages for ROS2 rolling	8m 50s
Generate Debian packages for ROS2 jazzy	8m 37s
Generate Debian packages for ROS2 iron	8m 50s
Generate Debian packages for ROS2 humble	8m 15s
Generate Debian packages for ROS2 kilted	8m 40s
Smoke test ROS2 iron	1m 51s
Smoke test ROS2 humble	1m 47s
Smoke test ROS2 kilted	1m 57s
Smoke test ROS2 jazzy	1m 51s
Smoke test ROS2 rolling	2m 7s
	52m 48s

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