Fix LRU recording

I remove the code from the LruFilters class which records objects after
saving or updating them.  The LruFilters code relies on setting
params.id after creating a new object.  Because this is hardly
comprehensible, I completely remove this code and add a
lruService.recordItem() call after each save() call (in save and update
action).

Furthermore, I rework all controllers and make them more groovy by
removing the return keyword and parentheses.  Also, I fix tab/space
issues in these files.