#80 DB filter list sortable

[Hans Zoebelein]

It might be useful to allow sorting of DB filters
Think about a database where filters are brand names you can search for. If you have created some filters and add an additional filter later, the additional filter is placed at the last position. So if you want those filters in alphabetical order, you have to reenter all flters to get a sorted list. Adding a button called 'sort' and/or two other buttons 'up' and 'down' to move filters in the filter lists seems to be a good idea.