Remove the buttons for exporting the result of a query to a csv file and
explaining the current query. Add those points together with the
submit/stop query functions to the editor menu in the main window.
Check for unsaved content in the editor widget/query input editor before
closing the editor and the main window, still todo: Documentation in
main window/mdi area
Export the full table to a CSV file in the context menu for a table node
in the tree model. Use the csv exporter as refactored tool. The exporter
can work with database parameters including the name of the table or the
resulting data list. TODO: Documentation
