Hi Alexandre,
Pressing "Abandon" in a pre-debugger window is cumbersome.
Indeed, requiring a fine-motor gesture for something so simple wears on productivity all day long.
It would be cool to press esc to remove it. What would be the easy way to do this?
Have you tried Command+W? Any window can be easily closed by simply moving the cursor out of the window (perhaps toward the window you want to visit next) and press Command+W. I never use the X (nor Abandon) on any window any more because Command+w is much easier. Now, in Squeak we also added Command+\ to send the current window to the back so, now to clean up the desktop simply position the mouse anywhere on the desktop and repeatedly press Command+w and Command+\ for the windows to remove/save, respectively.