Filter logic reworked

- Affects org and info field

- terms have to be saparated by pipe (|) 

- terms can be terms that will be OR-d or excluded terms that will be
AND-ed

- to exclude a term use !

- A valid filter search for info would be: 'term1|term2|!term3'
-> this would result in all events with the info field containing term1
or term2 but not term3