Supports down to workspace, this is problem. + some bugs.

[PetroRudyi]

We have a situation, where I need support on 2 flour, but not on 1.
But supports down to the work surface.

Cylinders have some parameters, like "Size" (diameter), "Max Size" (work with angle)

So how can I stop down supports to work surface?
Or, as the idea is, you can add a parameter height (10 mm down for example). This will solve problems like mine.

And some bugs!

PS. Remove last delete all supports

PPS.
`Clicking existing support deletes it

Clicking existing support + Ctrl switch automaticaly to the Translate Tool to modify the position of the support.

Clicking existing support + Alt this shorcut allow to add a support on a existing support.
`
any of this points doesn't work. Or I don't understand how I must "Click" on supports to delete it :\

Cura 5.1.1
If you need something, tell me

Thank you for attention