Unable to enter a two digit value for an angle of a label (1.1.1)

[Balmung]

Steps to reproduce:

1. Create a label with: "Some Text".
2. Switch to Transformation Tool.
3. Click inside the angle value field and press CTRL+A.
4. Try to enter "90".

After pressing "9", the value instantly jumps to 9° as the new value and you can't keep writing.

But: If you now repeat the steps above to enter "90", the "9" is not registered as a new value and won't trigger anything and you're able to enter the "0" to complete the "90" as new value.