Patch mesh and Remove mesh patch

[StephanP]

Can anyone explain to me:
- Patch mesh
- Remove mesh patch

[StephanP]

Is this about "to patch" meaning "to fix" or "to put a plaster on"
So there's something like a mesh network to which a patch/fix/plaster is attached.
And this patch/fix/plaster can be removed again?

It would be nice if anyone from the development team can shine a little light on this, preferrably by means of a visual example.
And while you're at it, please help me out on the other issues mentioned earlier as well, please.
I'm trying to reach 100% translation here.