Fixed a compile error: OpenPerspectiveAction has been moved to a different plugin/package.
Bugfix: #437.
It two consecutive tick marks had the same label and different timestamps (e.g. different days) the second tick mark was not be drawn. This was reproducible, if the time range was more than a week and the tick format was HH:mm.
As discussed with Kay Kasemir:
AutomaticHistoryRefresh and FutureBufferSeconds properties read from the preferences during the model/plot creation and kept unchanged for the lifetime of the model.
Merge pull request #455 from jbobnar/master

Fixed one FRIB compile error and #437