Fix bug introduced in last commit and cleanup

Deleted some unused or commented out code.

Fix: trying to clear non-existent form leads to an error
if no search was performed and one of the service type
buttons ("Eigene, Genutzte") was pressed.
Merge branch 'master' of https://github.com/hknutzen/Netspoc-Web
Fix issue #1 and add enhancement of issue #2

The rules displayed after a search are no longer filtered
by default and expanded accidentally when checking and
unchecking the "User expandieren" checkbox.

Instead, rules are still filtered by default, but checking
and unchecking does not change that anymore.

It is now possible to choose whether to filter the rules or not
by (un-)checking a checkbox called "Regeln filtern".
Merge branch 'master' of https://github.com/hknutzen/Netspoc-Web