Trying to get Defect info accessible to the DefectSetailsPanel. Not best
but it's getting closer. 

DefectDAO - added method getDefectByID() to return the Defect object
with the specified defectID.

DefectsListRowSelectionController - moved DB access to DefectDAO and now
can get Defect object for given defectID when row is clicked.

Moved Row selection controller from DefectListPanel to MainMenu.