Backspace bug in 0.3.1

[asmodai]

In 0.3.1 there is a bug with backspace.

If you create a equation and then press backspace to delete the part of the equation, the display gets adjusted, but the MathML code at the bottom is left alone. If you then proceed to do something like add a new identifier, the display gets refreshed with the MathML code that was left intact, meaning that you get what you thought you deleted.

Using the DEL button works though.