[prefs] added display-hdd-temp boolean in preferences

prefs.js

@@ -56,7 +56,12 @@ const CPUTemperaturePrefsWidget = new GObject.Class({
                 name: _("display-decimal-value"),
                 label: _("Display decimal value"),
                 help: _("Show one digit after decimal. (default: ON)")
-           }
+           },
+           show_hdd_temp: {
+                name: _("display-hdd-temp"),
+                label: _("Display hard disk temperature"),
+                help: _("Requires hddtemp installed. (default: ON)")
+           },
         }
 
         let counter = 3;

schemas/org.gnome.shell.extensions.cpu-temperature.gschema.xml

@@ -33,5 +33,11 @@
       <description>Show one digit after decimal</description>
     </key>
 
+    <key type="b" name="display-hdd-temp">
+      <default>true</default>
+      <summary>Display HDD Temp</summary>
+      <description>Display hard disk drive temperature. Requires hddtemp installed.</description>
+    </key>
+
   </schema>
 </schemalist>