lpcmanager

Reworked Firmware Update Dialog. Reboot is now proposed systematically after update. Fixed exception handling when updating, now progress dialog realy turns modal as expected when exception occurs.
UART_task_active = 0;
rt_task_resume(&UART_task);
rt_task_delete(&UART_task);
rt_task_join(&UART_task);
closeserial(UART_fd);
rt_mutex_delete(&UART_WriteMutex);
rt_mutex_delete(&UART_ReadMutex);