Use a consistent naming convention for elements

* Element names we use "_" as word-delimiter, not "-"
* Element names use less camel-case
* Element names end with the type
* Element names always start with noVNC_

include/blue.css

@@ -58,7 +58,7 @@
   color:#fff;
 }
 
-#keyboardinput {
+#noVNC_keyboardinput {
   background-color:#04073d;
 }