Pressing alt key shows the menu bar and moves all window content downwards
In evolution 3.48.4, pressing the alt key makes the menu bar visible as long as the key is pressed. This moves down the whole window content, which is rather irritating. In some conditions it also affects the positions where automatic (visual) line-breaks are happening.
As the menu is also completely available from the hamburger button, simply removing the menu bar completely seems like a good idea to keep the UI less volatile