The Name and Expression for the math node are tied together. Changing one changes the other

When changing the name of the math expression node it will in turn change the expression. Trying to name the node results in the math being replaced with the new name. This also works in reverse. If the math node has a name and the user then inputs some math, the name will be replaced with the math expression.

1. Open the Editor
2. Create a new Actor blueprint
3. Add a math expression node
4. Name the node "MathStuff"
5. Put 1+1 into the expression field
6. Notice the name changes to 1+1
7. Now change the name back
8. Notice the Expression becomes "MathStuff"

Expected: The name will read MathStuff with input and the expression will read 1+1 after inputting each field respectively
Result: The Fields are always the same thing and changing one in turn will change the other

[BUGS] Math expression. Wrong description