No more unwanted infill, on slopes

Note: The stable version is the 2.3.56.9, below.

new

• Add filament_max_overlap, to control the line spacing via filament setting
  It allows controlling the spacing vs width, like the "perimeter overlap" but for everything. It allows reducing overextrusion with filament that don't flow well (high viscosity) and so can't go under the nearby extrusion to fill the voids.
  For example, it may be better to use a ~35% overlap for abs.
• Add 'only one perimeter on first layer' as doing it manually via modifier wreck solid bottom layer count #289 #584 #1566
• Add seam_gap to control the space between the start and the end of the loop, for seam quality. #1534 #1606
• Some gapfill / thin wall optimisation, should compute perimeters ~5-10% more quickly.
• Move Extruder decimals from extruder to printer #1596
• Emit error if max layer height > nozzle diameter

bugfixes

• Fix error when scrolling over a layer with feature selection: everything was filtered out. #1522
• Fix artifacts from the "no more unwanted infill" (nb_perimeter_layers_for_solid_fill) feature #1581
• Fix lack of refresh after gcode generation #1533 #1591 #1532 #1542
• Polyholes now don't recognize a rectangle as a badly made circle to polyhole-ize. #1561
• Fix weird interior brim when inside an hole (inside island) #1526
• Fix retract_restart_extra_toolchange, now trigger at each first tool unretraction (but the very first) #1052
• fix small tab icon #1605
• Fix bridge_internal_fan_speed when equal or lower than the default speed #1414
• Fix the XY hole compensation when no threshold set #1540
• Fix Disabled acceleration control still applies to print #1537
• Fix some UI size issue on mac & linux: Add label_left option for setting ui to print the label aligned to the left instead of the right #1573
• Fix some gapfill issues (bits on the outer edge of a curves)
• Fix seams positions when each object has its own layers
• Fix "ensure vertical shell wall" for spiral vase #1582
• allow retract_lift_first_layer even when 0 lift to activate extra lift for first move before each object on first layer #1575
• Fix 'auto' max layer height #1569
• Fix first_layer_size_compensation #1547
• Fix undo/redo issues
• increased precision for overhang detection #1562
• Fix no_perimeter_unsupported_algo when there is multiple bridge areas #1595
  • Also Now "no perimeter on bridges" -> "only bridges" follow bridged_infill_margin #1155
• Increase detected bridge area a bit to tame it a bit the extra perimeters on overhang #1514
• Fix wrong boundingbox that mess with the support tower height #1612
• Fix Bridge flow calibration text with first layer height of 0.3 for a 0.4 nozzle #1462
• Fix color update on fresh extruder (it prevented to add an extruder switch)
• Increase max possible wipe speed to 400 (#1568) by Dave Bullock
• some typo & setting names

note: I haven't tested the linux & macos build.
You can have daily builds in the action menu of github.
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