Ts organized to hierarchy

[dvorka]

Implement brand new view which will allow organizing of Os and Ts in hierarchy:

• QTreeView widget.
• Panel widget
  • Up, ..., Down, Add child, Remove buttons allowing to edit hierarchy where allowed.

Persistence:

• MindForger repository only support.
• $MF_REPO/mind.mf ... bullets or codeblock w/ hiearchy.

Initial structure (analogous to knowledge navigator):

• Mind ... click View/Dashboard (not editable)
  • <notebook-1> ... click opens O, keeps mind view
    • ...
  • <notebook-n>
  • <tag-1> ... click shows Os/Ns filtered by tag (based on recent)
    • ...
  • <tag-n>
• editable up/down/right/left hierarchy, add child, remove
• mixing Os and Ts allowed

Adding/removing Os and Ts:

• Allow Os hierarchy
• O knows it's parent OR has offset
• O has a depth
• Deleting parent is not a problem - simply is not there and depth is the same.
• On creation parent O is active O (editation or within the list) - same as Wiki, when you create O, it is child of current entity.

Associated idea:

• tags are root nodes
• O can declare parents - can be N, O, T
• ? navigation:
  • parents | children ... table
    • on O: parents & root Ns
    • on N: parent and child Ns
  • alternative to associations table?
  • enabled/disabled aside to Thing in menu