Port the dblog admin screen

Wouldn't it be able to use the mongo views backend for this?

There should be a custom exposed filter, but i think thats possible

move to new project

There was a initial version commited by fgm

So here is a more advanced version:
- use rows of dblog
- add forms
- filter by existing types, not working yet.
- clear logs
etc.

So filter by type is working, filter by severity not yet, i have to figure out why.
I guess multiple ors aren't working as i do it now.

This one works, and features a few clean-ups.