update ft5 display during print

web/kiri/filter/FDM/FolgerTech.FT5

@@ -1,5 +1,6 @@
 {
     "pre":[
+        "M117 Heating",
         "M104 S{temp} T0     ; set extruder temperature",
         "M140 S{bed_temp} T0 ; set bed temperature",
         "G90                 ; set absolute positioning mode",
@@ -11,6 +12,7 @@
         "M190 S{bed_temp} T0 ; wait for bed to reach target temp",
         "M109 S{temp} T0     ; wait for extruder to reach target temp",
         "G0 Z0.25            ; position 0.25mm over bed",
+        "M117 Purge Nozzle",
         "G1 X100 E30 F600    ; purge 30mm from extruder",
         "M201 X1000 Y1000 Z100 E2000 ; max accel",
         "M204 P1000 T2000            ; default accel",
@@ -19,6 +21,7 @@
         "M205 X5                     ; max xy jerk"
     ],
     "post":[
+        "M117 Done",
         "M107                ; turn off filament cooling fan",
         "M104 S0 T0          ; turn off extruder",
         "M140 S0 T0          ; turn off bed",
@@ -29,7 +32,8 @@
         "M84                 ; disable stepper motors"
     ],
     "cmd":{
-        "fan_power": "M106 S{fan_speed}"
+        "fan_power": "M106 S{fan_speed}",
+        "progress": "{progress}% layer {layer}"
     },
     "settings":{
         "origin_center": false,