changelog
    
    
    - Fri, 22 Jun 2018 12:13:01 +0300
 
    - by Teemu Piippo <teemu@hecknology.net> [Fri, 22 Jun 2018 12:13:01 +0300] rev 1419
 
    - replaced uses of QList with QVector
 
    - Thu, 21 Jun 2018 19:21:49 +0300
 
    - by Teemu Piippo <teemu@hecknology.net> [Thu, 21 Jun 2018 19:21:49 +0300] rev 1418
 
    - used the new CircularSectionEditor in CircularPrimitiveEditor
 
    - Thu, 21 Jun 2018 18:46:03 +0300
 
    - by Teemu Piippo <teemu@hecknology.net> [Thu, 21 Jun 2018 18:46:03 +0300] rev 1417
 
    - refactored the segments/divisions editor in MainWindow to a new widget