Morse app CW mode issues when Loop is enabled

[NotherNgineer]

Describe the bug.

In the Morse app, when CW mode is selected and "Loop" is enabled:

1. The app hangs after the first wait interval (if the user doesn't press STOP), and a power cycle is required to exit.

2. Pressing STOP during the first Wait interval causes odd progress bar behavior and the transmissions actually do start to occur periodically after the user requested that they be stopped. In this scenario, periodic CW transmissions occur even after exiting and re-running the app, so it seems that the background task was never stopped.

Reproduction

Run Morse app, pick a freq such as 426mhz, enter any message, mode=CW, Loop=any non-zero time in seconds. Press Start. The first transmission occurs fine, the wait interval elapses, then the app hangs. Other odd things happen if STOP is pressed during that first wait interval.

Expected behavior

App should not hang, it should retransmit at the specified loop time interval, and it should stop transmitting when "Stop" is pressed.

Environment/versions

Reproduced with latest nightly

Anything else?

No response