Note taking and task management

[nataliethistime]

Currently each body has a 'notes' column.. then in the PCC you can modify those notes.

I'd like to expand this to a new window in the game that allows you to add notes and tasks to categories. Categories will be nestable (folder-like structure behaviour) and we will automatically generate a category for each colony - under "Planets". Ditto for "Stations".

We could then do this for sitters as well.. "'s Planets" and "'s Stations".