TODO list for ssn_viewer

[seanrjohnson-neb]

• modify table values, add table columns interactively
• Save/load program state
  • presumably with an extended version of the current input file format, that contains an extra section for program state along with the source data.
  • Interface and program options may change a lot through different versions of the app.
• save and load selection presets. So you can swap between different selections and see where they are. Maybe like the old StarCraft group presets using ctrl+[0-9] or similar. Or maybe just through the button interface.