#4 GUI window becomes taller after program starts.

[C. Poda]

The height of the window increases by about 20% when a big letter is shown in the main window above the letter bars.

With the window placed at the bottom of my screen, the bottom part of the window goes below the bottom edge of the screen and cannot be seen, until I move the window.

Steps to reproduce.
. Click Start.
. Hear the Morse code for a character.
. Do not press any keys; wait for the Morse to be repeated.
. After 4-5 replays, the char is shown in the window in very large size.
. The first time this happens, the height of the program's window increases - the bottom margin moves down, and that part of the program's window can go off the bottom of screen and be invisible to the user.

Suggestions.
1. Draw the window the desired size & location when first starting the program. Do not change window size after the program begins.
2. Use a smaller size character, that will fit the original window size of the program.