Please see this post for how to share a flow so that it is importable. You can edit your first flow.
Also please explain a bit more what problem you are seeing.
I am not seeing that, but for me, running in Waterfox browser on Ubuntu Output on Release doesn't work properly at all. When I release the mouse button it doesn't stop controlling the slider, even if I move the mouse away. I have to click it to get it to 'release'. Running dashboard 2.19.3, node-red 1.0.2