Comment 2 for bug 1635090

The problem with extra levels or alt codes is they are neither flexible (think about all the emojis that get added almost daily, or people wanting to type the correct typgraphic symbols for multiple languages without having to switch the keyboard layout everytime) nor discoverable, which is exactly why I'm proposing something different. Stuff like typing AltGr+- (or Alt+0150 on Windows) to get a half em dash ("–" common in German) only works for a limited number of characters, because space is limited and users can't know / remember hundreds of combinations not actually labelled on the keyboard.