20181101 Magnus Schieder
  delete empty projects in getan
  BER: understand the use case better first

20180806 Magnus Schieder
  The break can be assigned to a project.

20180117 Magnus Schieder

  Creating a new database with test data:

  1) Delete getan_test_data.db if it already exists to create a new database.
  2) Execute getan_test_data.py to get the test database getan_test_data.db.
     (getan/test_data/getan_test_data.py)
  3) Open getan with the test database. (getan /path/getan_test_data.db)

- Bug 1.0
  4) Switch to the entries from the project pro1 with tab.
  5) Mark with return and arrow keys ent1 and ent2.
  6) Go back to the projects with tab.

  20180118BER:
    Observation: ent1 and ent2 are not highlighted anymore.

  20180126 Magnus Schieder
    The selection is deleted when switching to the projects.
    So ent1 and ent2 should not highlighted anymore.


20160912 BER: Better code: states.py: classes EditEntryState and
  AdjustEntryState have same methods exit() and set_focus(), maybe join them?

Older:

- Create a 'Help-Widget' to give the user an information about all possible
  keys.

- reimplement RPN input for current getan implementation (28489e672e61)

- The sum of previous times and currently running time should be displayed as
  in previous versions of getan.

- The currently running time should be shown near the project.