Misc designer change
Improving rendering of images on CPictureBox and ZoomablePictureBox
Fixing background image clipping on zoomable picture box
Creating layer controller and layer control basic body classes and implementing them on the frame view
Correcting layer indexing on the Frame class
Creating a Modified event for the ImageEditPanel.PictureBox class
Adding a getter for a protected field
Adding event for the clearing of the UndoSystem
Making the BitmapUndoTask subclass the BasicPaintOperationUndoTask class
Implementing basic layer interface functionality