late 2.4 edition

Fix some serious bugs (and many other) for the 2.4 branch

bugfixes

• Fix crash when slicing multiple objects
• fix crash when seam placement #3128 #3115 #3106 #3090
• Fix mmu paint #2639
• Fix double interior brim #3185
• Fix autospeed: max print speed % #3110
• don't unretract when wiping if using firmware retraction. #3163
• Fix computation for empty layers. (mostly with raft)
• contiguous: allow paint & Seam sphere for the base position. #3058
• Fix seam sphere position when loading a project (again) #3153
• Fix first layer z position in the gcode viewer. #3125
• Profile: fix creality brace in filename. #3157
• Fix search / unsaved changes for setting arrays #1052
• Fix icon splashscreen #3135
• fix string/empty custom variable #3126
• scripted widget: #3144 #3175
  • Fix default reset of scripted widgets
  • now executed at conf load, to apply changes
  • fix refresh for float/&percent
  • fixed ask_for_refresh() for non-bool
• wipetower with klipper: don't pass the extruder to SET_PRESSURE_ADVANCE if the extruder name is blank #3073
• fix missing retraction when the lift is merged in start_gcode_manual & no layer_gcode #2916
• Fix milling post-process #2739 #2786
• Fix gui not refreshing for 'single extruder mmu' tab #3176
• Fix thinwall-merge to keep a real loop
• Fix for when the seam gap is too big for a very small loop.
• change download page from hardcoded prusa #3069
• typos #3149

notes

I haven't tested the linux & macos build (but the arm one a little).
The mac arm should run ok as-is, tell me if there is a problem with this one.
The mac intel version will ask you for permission. You may need to do xattr -cr /Applications/SuperSlicer.app.
For Windows automatic installer/updates: https://community.chocolatey.org/packages/superslicer . Note that it has some days of delay, for the validation process.
You can have daily builds in the action menu of github.
You can support me with the "sponsor" button