Configtool: save target candidate pins, not the metadata ones.

Previously, all the cancicates were replaced with the ones from
board.metadata, messing things up. Appears to work fine now,
candidates are preserved.

configtool/boardpanel.py

@@ -532,6 +532,10 @@ class BoardPanel(wx.Panel):
     skipToSensorEnd = False
     skipToHeaterEnd = False
     tempTables = {}
+    candThermPinsWritten = False
+    candHeatPinsWritten = False
+    candProcessorsWritten = False
+    candCPUClocksWritten = False
     for ln in self.cfgBuffer:
       m = reStartSensors.match(ln)
       if m:
@@ -590,6 +594,34 @@ class BoardPanel(wx.Panel):
           skipToHeaterEnd = False
         continue
 
+      if reCandThermPins.match(ln):
+        if not candThermPinsWritten:
+          for pin in self.candThermPins:
+            fp.write("//#define TEMP_SENSOR_PIN " + pin + "\n")
+          candThermPinsWritten = True
+        continue
+
+      if reCandHeatPins.match(ln):
+        if not candHeatPinsWritten:
+          for pin in self.candHeatPins:
+            fp.write("//#define HEATER_PIN " + pin + "\n")
+          candHeatPinsWritten = True
+        continue
+
+      if reCandProcessors.match(ln):
+        if not candProcessorsWritten:
+          for pin in self.candProcessors:
+            fp.write("//#define CPU_TYPE " + pin + "\n")
+          candProcessorsWritten = True
+        continue
+
+      if reCandCPUClocks.match(ln):
+        if not candCPUClocksWritten:
+          for pin in self.candClocks:
+            fp.write("//#define F_CPU_OPT " + pin + "\n")
+          candCPUClocksWritten = True
+        continue
+
       m = reDefBoolBL.match(ln)
       if m:
         t = m.groups()