Fix in HistoryTabModel
Merge branch 'master' of github.com:alajal/soft6

Conflicts:
	data/POSdb.properties
	data/POSdb.script
Method won't allow enter new item with existing name, wider UIwindow
Merge branch 'master' of github.com:alajal/soft6

Conflicts:
	data/POSdb.properties
	data/POSdb.script
	src/ee/ut/math/tvt/salessystem/ui/model/HistoryTabModel.java
	src/ee/ut/math/tvt/salessystem/ui/panels/PurchaseItemPanel.java