Extremely simplified the ToolBar, now the GUI is going to look much clean and adapt to a DAW. Continued the implementation of the new core classes, this is the first step to go with a clean engine, final aim : CommonClass will be removed. As planned i'm continuing in the way of removing classes unworth to be reworked such as : AboutBox, MyClipBoard, History those will be restored or rewritten when the Core will be ready. This commit make the program pretty unfunctional : no undo, no right click menu on the track.