Control settings uses partwise US keyboard layout (on German keyboard layout)

In MCP 1.8 it seems to be a LWJGL issue. It returns for example for "ß" an event key value which is greater than 0.
See also:

• https://github.com/LWJGL/lwjgl/issues/59

• MC-30704

I am really sorry if this is a duplicate 😞
How to reproduce (I think you have to use a German keyboard layout):

• Open the control settings

• Change a key for a action (example: Left) to for example "ä"

Affected keys:

• ^

• AltGr

• ß

• ´

• #

• +

• ä

• ü

• ö

Even some of the keys works later, for example AltGr doesn't:

It sets the used key to LeftControl, but later no matter if I press LeftControl or AltGr the action assigned to AltGr will be performed

Why this is only partwise maybe the US layout:

• Using Z or Y works correct, even they are switched on the US layout

• Pressing Strg (=Left Control) works, but AltGr gets also to LeftControl

Note:

• "Open Command" is default assigned to "Slash" however "Slash" is with the same layout "#" on the German keyboard. This means pressing "#" opens the chat and lets you enter a command