This patch applies the correct pagename cleaning to namespaces as well.
Namespaces should follow the same rules as pagenames but due to a bug it
was possible to have namespaces ending in a underscore.

If you used such a namespace it will be inaccessible after applying this
patch. You should rename the namespace directory on the filesystem
(removing the trailing underscore). You old links will then work
automatically again. Rebuilding the search index is recommended.

This commit adds new strings to the pt files which
have been introduced through the new Media-Manager.
(commit fb46ebd8)

This commit adds new strings to the de/de-informals files which
have been introduced through the new Media-Manager.

All lang.php-files in inside en/de/de-informal have been
reordered and reformatted.

when saving plugin.local

Plugins with a disabled file will be treated as having an entry (=0) in
conf/plugins.default.php overridable by conf/plugins.local.php

Function get_plugin_components() moved to extantion manager