Size input box too narrow in UMG Widget Editor

Only 2 digits are visible in the size box that holds values between 1.0 and 0. Meaning most values will contain 3 digits. This is different from UE4 where more digits are visible.

1. Create a new Widget Blueprint
2. Add a Horizontal Box
3. Add a TextBox to the Horizontal Box
4. In the TextBox details set Size to Fill
5. Enter in 0.25

Expected:
At minimum 3 digits would be visible.

Actual:
Only 2 digits are visible making it hard to determine the value.