Controls do not save.

Put the summary of the bug you're having here

What I expected to happen was...:
Describe what you thought should happen here
My controls I set would stay the same

What actually happened was...:
Describe what happened here
If I restart Minecraft they are default again

Steps to Reproduce:
1. Go to controls
2. Set controls
3. Play Minecraft like normal, they are what you set.
4. Restart Minecraft.
5. Controls are back to default