BaumModel extends CidsBeanTableModel_Lagis, and necessary changes in AddExistingBaumPanel and BaumRessortWidget
#2 created BaumTable
added BaumTable in BaumRessortWidget
#2 added Undo and Sort button to BaumRessortWidget
#2 removed var isinEditMode from BaumModel
#2 changed layout of BaumRessortWidget
#4 added featureSelectionChanged() to AbstractCidsBeanTable_Lagis
#4 added valueChanged_updateFeatures() to AbstractCidsBeanTable_Lagis
#4 added possibility to disable/enable FeatureSelectionChangedListener
#4 added a class as parameter for featureSelectionChanged() in AbstractCidsBeanTable_Lagis
#2 Merge conflict resolved. Merged 'dev' into 'feature/2-undo-buttons'
Merge branch 'feature/2-undo-buttons' into dev
Closes #2