Integer underflow when displaying variable value

[eidekrist]

Discovered while messing around with a variable of type Integer using cosim-demo-app v0.7.0 with Chrome version 86.0.4240.111.

When overriding the value of a variable with type Integer to e.g. -1, the value is displayed as 255. This continues with increasingly negative numbers; -2 is displayed as 254 etc, until one reaches -33. From this point on, the value is shown correctly.

I think this is just a problem with the display of the value, but that should probably be investigated.