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.

Attention: $lang['register'] has been renamed to $lang['btn_register'],
anyone using that in any plugin or template should adjust it.

besides via Save or Preview button. This has been successfully tested in FF,
Chrome and IE6/7/8. Opera does not support onbeforeunload, therefore the draft
is kept if the user navigates away from the editor.

Please test this.

Ignore-this: ae145212697afcd073253bd16030f0ab

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Removed unused string, move another string to the [js] subarray.

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