improve user experience when trying DFU on old firmware
improve user experience when trying DFU on old firmware

madcowswe/ODriveFirmware,madcowswe/ODrive,madcowswe/ODriveFirmware,madcowswe/ODriveFirmware,madcowswe/ODrive,madcowswe/ODrive,madcowswe/ODriveFirmware,madcowswe/ODrive,madcowswe/ODrive