Gengo widget not theme (and xhtml) compliant

[conradoplg]

The Gengo "Language Controls" widget is not theme compliant.

Since it adds hard-coded h2 headers in each widget section header, it may break themes since their heading structure may be different.

I'm not sure which is the best way to fix this, but in the attached patch, I basically treated the widget like three distinct widgets in sequence.

I've also fixed a minor issue which prevents XHTML validation: the "Language control" ul element had the same id as the "Available languages" ul element. I've changed it, but I'm not 100% sure if this can't break something (I've tested it and found no problems)

[conradoplg]

I've just realized that the diff breaks the "gengo_language_control" function, so it needs some tweaking...

[conradoplg]

...aaand realized that this breaks XHTML again by generating 3 ul's with the same id "gengo_command". I'm not sure how to fix this.

[pixline]

The patch is invalid, but the issue stll exists.

[conradoplg]

2nd try

[conradoplg]

Here is another try at a patch.

It doesn't break anything as far as I know, since now I'm using default argument parameters. Solved the repeated id issue with a hack, but I think it does the job.

Tested with widgets and template functions, works OK. XHTML compliant.

Also did some tweaking to the js code for the add/remove languages in order to display "None" on "Available Languages" when there is none. (Before it wasn't XHTML compliant due to the ul element without li's)