#28. attempting to change tabs and content based on current group / tab selected.
#28. fixing conflicts when pulling development branch
updating CRUD.query_list to return row id's instead of column ids
closes #40. closes #41. Adding Serializable to Item
project properties...
#31 Groups are now selected by drop down (spinner)

Instead of having the user type the group they want to add a list to,
this allow them to select from the list of created groups. Also this
saves us from having to query for a group based on its name
#39 fixing conflicts