grc-qt variables do not evaluate their python values

[chrisjohgorman]

What happened?

Put a variable on the canvas and set it's value to 48e3*4*8. The gtk grc evaluates this variable and shows it as 1.536M. Currently the grc-qt interface leaves the value as 48e3*4*8.

System Information

OS: Arch Linux
GR Installation Method: Source

GNU Radio Version

3.10 (maint-3.10)

Specific Version

3.10.10.0

Steps to Reproduce the Problem

1. place a variable block on the screen.
2. set it's value to a python expression. eg. 100*100
3. see that the expression is not evaluated, ie. it shows 100*100 rather than 10000

Relevant log output

No response