Patch: Translations of menu titles and descriptions

I have been playing with drupal for the last few days and in particular with the internationalization features. After a few test runs, I found that:
1. Translating aliases didn't do what I expected to do. In particular, creating localized aliases such as en/home and de/start wasn't working correctly, as the translation switcher would point to en/home and de/home instead of using the localized path. This has been fixed by this patch: http://drupal.org/node/67814

2. I didn't like the way menu titles were translated through the string table because the workflow of that is very cumbersome. Also, if the english title changes, all the translations would have to be redone.
That's why I created the attached patch as a proof of concept. It has the following improvements:
a) translate menu title AND menu description, not just the title
b) it adds a new page admin/menuTranslate which offers a grid-based editor for the translations

This is implemented by adding a new database table, i18n_menu, which has translations of menu titles and descriptions for each language.
The menuTranslate page is generating an html from and rendering it as a themed table. I tried to do it through the drupal forms api, but after a few hours I decided to do it by hand (I'm still quite new to drupal).

Installation:
- put the attached i18nmenu.module into modules\i18n\contrib, replacing the existing one
- run i18nmenu.mysql against your database to create the new table. You may need to edit the sql statement if you use table prefixes.
- optionally include the supplied css fragment in your theme's css

Remaining tasks:
- this is my first attempt at some drupal development, so it may not follow best practices along the lines of style or performance
- only mysql support so far. The table creation should be done in an install hook and perhaps support other databases.
- the translation editor page can potentially get very big, which may not work with some themes. Also, it could perhaps use paging and the forms api.

In any case, I hope that some people may find this useful.