New functionality - Table tree view

Hi,

It's been a while I think a possibility of tree view for table will be a great improvment for pgadmin.

It's possible to consider "tree view" in differents way
- Possibility to create virtual directories for tables and possibility to expand or not expand these directories
- Possibilty to group table by a prefix/suffix/regexp of tables names
- Possibility to group herited tables
- other possibilities...

When we have hundreds table, it will be a great help. And I think with a little imagination we should be able to find a solution

Thanks.