* Deal with situation when the scanning garbage is empty. * Display hardware manufacturer logo. * Add Gio.Settings notify for Unity and Mate settings. * Make interface switching more smoothly. * Adjust the layout of interface. * Beautify skin center, menu, info module and setting module. * Rewrite skin center, aboutdialog and animation. * Add upgrade function. * Delete debug logs and command history. * Rewrite camera module and replace pygame with opencv. * Make dash blur experimental normal(LP: #1430118). * Modify custom skin filter(LP: #1475074). * Modify cleanerdetailwidget.