fix multi-widget slice / export layout in sla mode

web/kiri/filter/FDM/Anycubic.i3.Mega

@@ -0,0 +1,51 @@
+{
+    "pre":[
+        "M105          ; update temperature",
+        "M104 S{temp} T{tool}",
+        "M140 S{bed_temp} T{tool}",
+        "M109 S{temp} T{tool}",
+        "M190 S{bed_temp} T{tool}",
+        "M105          ; update temperature",
+        "G21           ; set metric values",
+        "G90           ; set absolute positioning",
+        "M82           ; set extruder to absolute mode",
+        "M107          ; turn off fan",
+        "G28 X0 Y0     ; move X/Y to min",
+        "G28 Z0        ; move Z to min",
+        "G1 Z15.0 F100 ; move the platform down 15mm",
+        "G92 E0        ; zero extruder",
+        "G1 F200 E3    ; extrude 3mm of feed stock",
+        "G92 E0        ; zero extruder",
+        "G1 F100       ; set default feed rate",
+        "G0 Y20        ; wipe move to Y20",
+        "G92 E0        ; zero extruder",
+        "M117 Printing..."
+    ],
+    "post":[
+        "M107                ; turn off fan",
+        "M104 S0 T{tool}     ; turn off extruder",
+        "M140 S0 T{tool}     ; turn off bed",
+        "G1 Z{z_max} F1200   ; drop bed",
+        "G28 X0 Y0           ; home XY axes",
+        "M84                 ; disable stepper motors"
+    ],
+    "extruders":[
+        {
+            "nozzle": 0.4,
+            "filament": 1.75,
+            "offset_x": 0,
+            "offset_y": 0,
+            "select": [ "T0" ]
+        }
+    ],
+    "cmd":{
+        "fan_power": "M106 S{fan_speed}"
+    },
+    "settings":{
+        "origin_center": false,
+        "extrude_abs": true,
+        "bed_width": 210,
+        "bed_depth": 210,
+        "build_height": 205
+    }
+}