Add warning for "One layer of non-solid infill between bottom and top solid infill"  

Add warning for "One layer of non-solid infill between bottom and top solid infill"

The default 0.2mm layer height settings have four bottom layers and five top layers. That's fine, except when you're printing a part exactly 2mm thick: then the slicer will create four bottom layers, a single layer of whatever your non-solid infill is (grid, cubic, etc.), and then five layers of solid infill. That single layer of non-solid infill may save weight and material, but it also necessitates a bridging layer atop it, and potentially impacts surface quality. This is exacerbated if you've got a part that's 2mm thick and has some surface details which are a total of 2.2mm thick: now you've got a single layer of non-solid infill, followed by a layer that's got partial bridging and partial non-solid infill, followed by a layer with a mix of bridging and normal solid infill.

I'm not asking to disable this capability entirely, but PrusaSlicer already provides warnings for certain types of print instability. It would be nice if it also warned the user post-slicing if it detects single layers of non-solid infill between layers of solid infill: the user could then choose to increase the number of bottom (or top) layers to eliminate the issue.

A more advanced solution would be a "minimum layers of non-solid infill" setting: if it ever detects a region with fewer than that many layers of non-solid infill, they get replaced with solid infill. That would be preferrable, but I can live with the warnings.