Pre-collect info about options on field init

- When initializing fields use the configuration to determine the format
- Cache the line for each option for fastest string compare / replace
- Add logging levels for debugging

Marlin/configurator/index.html

@@ -48,6 +48,15 @@
         <label class="newline">Temp Sensor 2:</label><select name="TEMP_SENSOR_2"></select>
         <label class="newline">Bed Temp Sensor:</label><select name="TEMP_SENSOR_BED"></select>
 
+        <label class="newline">Redundant Sensor:</label>
+          <input name="TEMP_SENSOR_1_AS_REDUNDANT" type="checkbox" value="1" checked />
+
+        <label>Max Diff:</label>
+          <input name="MAX_REDUNDANT_TEMP_SENSOR_DIFF" type="text" size="3" maxlength="2" />
+
+        <label class="newline">Temp Residency Time (s):</label>
+          <input name="TEMP_RESIDENCY_TIME" type="text" size="3" maxlength="2" />
+
         <h2>Marlin/Configuration.h</h2>
         <pre id="config_text" class="prettyprint linenums"></pre>
         <h2>Marlin/Configuration_adv.h</h2>