tool_cb_prg: output "flying saucers" with leading carriage return

tool_cb_prg: output "flying saucers" with leading carriage return

Because that is how the progress-bar is output, so when the progress-bar
has been shown at least once and the information is reset, like for a
redirect, there might be a moment where the size goes from known to
unknown and then the flying saucerts are shown after a brief display of
the progress-bar.

It could previously cause accidental character leftovers on the right
side of the bar when using a narrow display.

Reported-by: Chris Webb
Fixes #14213
Closes #14246