Im building ROS melodic right now, and I just found this post looking how to fix a compilation issue with actionlib. As I need learn and improve, Im going to try finish my installation, although n parallel as you made the effort to share this, I going to test your Image with the same stuff that I will use in the mine if I get it compile XD. I have realsense d435 and r200 if you need I test something,as I read your intention to add in the future.
just thanks thanks a lot by share. Your company and products looks awesome, I wish you the better.