Input of accent glyphs

[y0014984]

Some glyphs need to be created by pressing two different keys after each other. For example, to print the character é you first press the key ´ which results in no printed sign, secondly you press the e button and then these tho signes are merged together. At the moment the input of such signs is not possible in our Terminal because we can only print characters that need one keypress.

We could implement this by adding some logic for this glyphs or we switch to a normal RscEdit control, like mentioned in issue #235