You know what you can do for now? Rebind "confirm window" shortcut in settings from "E" to "CTRL+E" (or personally I recommend even stronger "CTRL+SPACE") and learn that by muscle memory. It can be pressed using exclusively left hand as well (so no need to move hand from mouse to press ENTER), is quick as hell and doesn't interfere with the scientific notation. It would only require re-learning, but I absolutely don't see any disadvantage of that - it wouldn't conflict with other shortcuts, ctrl+space can be even faster to press (fingers naturally rest on CTRL and SPACE, I use it regularly in IDEs for programming to show autocompletion so it's like a second nature to me already). The only argument in favor of E is player attachment.
CORRECTION: I just tried it, and — unfortunately — the CTRL+SPACE shortcut DOESN'T WORK (bug!) when the input is focused!