implemented according to the latest improvement of ControlTester. TestIsVisible is poorly defined because it start with Assign without conditions.Related to Issue [DSB-520]
another code improvement - construction and disposing of the control object is done on TestFixture level. In child classes you need to override CreatePropertyControl()Related to Issue [DSB-532]
+ improved TestLabelControlVisibleValue to check visibility because label can be invisible together with edit.+ removed TestTextBoxVisibleEnabledCaption() because in DSL projects textboxes are not used.Related to Issue [DSB-527]