Bug 468323 N810 task switch button reloads page

r=mfinkle

http://maemo.org/maemo_release_documentation/maemo4.1.x/Maemo_Diablo_Reference_Manual_for_maemo_4.1.pdf
Page 129, the hardware home key maps to F5 and is used to "show home"

mobile/chrome/content/browser.xul

@@ -139,7 +139,11 @@
     <key id="key_forward" keycode="VK_RIGHT" command="cmd_forward" modifiers="control"/>
     <key id="key_back2" keycode="VK_BACK" command="cmd_back"/>
     <key id="key_forward2" keycode="VK_BACK" command="cmd_forward" modifiers="shift"/>
+#ifndef MOZ_PLATFORM_HILDON
     <key id="key_reload" keycode="VK_F5" command="cmd_reload"/>
+#else
+    <!-- F5 on maemo is "home" which is a task switching key -->
+#endif
     <key id="key_focusURL" key="l" modifiers="accel" command="cmd_openLocation"/>
 
     <!-- scrolling -->