Add user defined columns with check-box option
I'd like to be able to create my own columns with user defined values like percent or True/False Yes/No to mark in a box (like it is possible to mark/unmark category now). Then I would be able to sort by my own values. And this way it would be possible to use user defined columns as categories. It would give more flexibility. For example when I have multi-category task, goal - for now category option doesn't allow to sort them properly. I wish it could work similarly to Libreoffice Calc table where I can sort using different filters. I hope you understand. If not I can further explain :)
This is a duplicate of this:
https://taskcoach.uservoice.com/forums/26465-desktop-version-windows-linux-mac-of-task-coach/suggestions/313688-add-custom-fields
Please vote for that instead, thanks.