There is an issue for the online manual about this topic (see issue
#101).
I was not involved in this change and have to investigate about the intention for this change.
The right mouse button click, which works similar to ESC, wasn't changed obviously.
So for trimming or other mouse favored actions, it's no problem as right click works as expected.
Single click to select a new limiting entity or start a new line segment and right click twice to cancel the tool.
But for command line actions I agree about the extra key press, which was added by this change.
investing less than half an hour into Search function can save hours or days of waiting for a solution