Added a failing test case "Defect_MAGN_784" along with its companion file
Merge pull request #785 from Benglin/CbnUndoTestCase

Merging the test case in the interest of verify near future fix.
CBN creation inside boundary fix
Direct method to avoid forming an Undo action during Load/Save
Undo Redo for input ports of cOdE bLoCkNOde
CBN min size fix
Test Case for MAGN 411