issue-7932: add option to repeat last layer while reducing extrusion to get a flush last layer in vase mode closes

[b3n3d1k7]

closes #7932

[b3n3d1k7]

@bubnikv I noticed you implemented the tapering of the extrusion for the first spiral vase layer back in 2020.
Could you maybe take a look at this PR to improve/fix the last spiral vase layer.
It is heavily based on your implementation 😉
I would greatly appreciate your feedback.

I added some screenshots and photos of prints with the fix vs without in comments of the linked issue:

• Graceful end of vase mode print #7932 (comment)
• Graceful end of vase mode print #7932 (comment)
• Graceful end of vase mode print #7932 (comment)

[tg73]

FYI, equivalent functionality is included in #12142 (my pr) and likely in #12079 (not mine, but based on the same port from OrcaSlicer, I didn't notice this PR before opening mine). With these PRs, the "graceful end" is always performed. These PRs also provide other significant improvements to vase mode.

[b3n3d1k7]

FYI, equivalent functionality is included in #12142 (my pr) and likely in #12079 (not mine, but based on the same port from OrcaSlicer, I didn't notice this PR before opening mine). With these PRs, the "graceful end" is always performed. These PRs also provide other significant improvements to vase mode.

I will close this PR, as it is pretty much useless now with the two other ones.