Initial commit, everything works.
remove redundante query function
correction in graph structure and comentary deletion
fixed selection refresh
columns added
add column query
minor changes
selections work now, at least for moust part
fixed fill tables once
add node buttons and button images
fixing something
delete edges is not fixed
edge labels work again now
aggregations to some degree work
changes in graph for sort
code clean up
adding graphical visualization of the sort arrows in the upper column
sorting query generation works
added button that makes selection array empty
sort can now be seen in tables when the refresh button is pushed