Automatic updates and translations

[nbachiyski]

There are a couple problems with the current implementation of automatic updates in regard to translated versions:

1. Some people don't want to upgrade to the local package, because

they have more than one locale on the installation and the API call
sends the current locale.

2. Local versions are usually released a day or two (or more) after

the English one. If users upgrade to the English one, they have no
means to be notified when the local one is released.

Here is a patch, which adds support for more than one update sent by the API. All the available updates are listed on the update page and the user can install any of them. Translated updates can be hidden if one doesn't want them.

Also in the patch: simple styling for the update page; Updates item in the Tools menu, so that hidden updates are somehow available if somebody wants to unhide them.

[ryan]

(In [9441]) Better i18n support for automatic upgrade. Props nbachiyski. fixes #8023