Even more fixes/improvements:

Even more fixes/improvements:
- Added filter pre_youhere_line. It will be executed directly before the
  div-block of the 'You are here' navigation
- Saved an else-block and br-tag in same function
- For that missing br-tag a CSS 'margin-bottom' needs to be added to
  you_are_here CSS class
- Fixed default value for an enum in ext-removeip in the configuration SQL query