[SudokuDialog] add QStatusBar
[SudokuDialog] delete obsolete statusBarLE, progressLE
[SudokuController] connect resultEmiter to ProgressBar slot showMessage()
[SudokuController] add emitors and connect them to progressBarto showMsg
[SudokuContro] set deafault timeout to 0 in signals sendStatusMsg
[SudokuThread] add callings sentStatusMsg to inform user
[SudokuDialog] add calling sentStatusMsg to inform user
[SudokuTableModel] add calling sentStatusMsg to inform user