[Hack, v3.0] Auto-open 'page options' (slug, tags, navigation, etc.)

[Rene]

Needed this Auto-Open plugin but only for my Special Pages. On my Special Pages I don't use the content and also wanted to hide the page meta info part. Some of that is already set with Special Page Configure.

I converted mvlcek's plugin into attached plugin 'specialpage_options_auto_open'. The Auto-Open trickers only on Special Pages so I removed the Cookie part.

Use on tab 'Pages', edit a Special Page