Add --hide-unmonitored flag to ncurses frontend #188

Job	Run time
determine-distros	4s
Generate Debian packages for ROS2 iron	8m 45s
Generate Debian packages for ROS2 humble	8m 40s
Generate Debian packages for ROS2 jazzy	8m 18s
Generate Debian packages for ROS2 kilted	9m 39s
Generate Debian packages for ROS2 rolling	9m 0s
Smoke test ROS2 rolling	2m 7s
Smoke test ROS2 kilted	2m 10s
Smoke test ROS2 iron	1m 54s
Smoke test ROS2 jazzy	1m 54s
Smoke test ROS2 humble	1m 48s
	54m 19s

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