Same abbreviation for different layouts

Add 2 keyboard layouts, e.g.:
1. German -> German
2. German -> Russian (Germany, phonetic)

Both are shown as `de` in the indicator. The first one uses Latin letters and the second one is using Cyrillic letters (It's a Russian layout, which is easier to type with a German keyboard).

Such layouts are listed as variants of the German keyboard (and for different languages as well).
The indicator shows only that it's a layout for German keyboards `de`, no matter which variant you are using.

So it's hard to tell from the indicator, which layout is currently chosen.

Please use either the variant name `ru` or add numbers `de1` and `de2`.