removing curves in connector (#253)
I played with a line and tried a curved rectangle.
It worked not in this drawing, so I switched the style to curve.
I then had to remove some curve points. double clicking worked once I believe. The second time it gave an error:
System.InvalidCastException: Unable to cast object of type 'SoftwareIdeasModeler.Core.DiagramItems.UmlObjects.ConcreteUmlActivityRegion' to type 'SoftwareIdeasModeler.Core.DiagramItems.Concrete.ConcreteRelation'.
at SoftwareIdeasModeler.SimDiagramControl.canvas_DoubleClick(Object sender, EventArgs e)
at System.Windows.Forms.Control.OnDoubleClick(EventArgs e)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
at System.Windows.Forms.ContainerControl.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)