Position flags

[roman-yagodin]

Some high-level, organization-global positions are self-describing, like "president", "director", "rector", "vice-something", etc. - so there is no need to add division name / link to them.

The options are:

1. Use position weight - so all positions with weight greater than some boundary value (defined in currently not implemented organization / portal level setting) are automatically fall to that category.
2. Add additional flag to the position entity (more work, but no uncertainty with organization-level settings and no direct relation with position weight).

[roman-yagodin]

Also thinking about a flag to distinct teachers / trainers positions from others.

[roman-yagodin]

A workaround for organization-global positions is just to add a root division (with name same as organization name). Hiding division link have no big sense, so leaving this as is.

Distinction of teacher positions from other do have future uses in the planned EmployeeDirectory module.

[roman-yagodin]

Distinction of teacher positions from other implemented in b22f77e