[cdt-debug-dev] Add memory monitor dialog

[John Cortell <john.cortell@xxxxxxxxxxxxx>]

Samantha,

The platform dialog for adding a memory monitor accepts an empty 
expression string. The code seems intentional in allowing this. With 
CDT, doing so results in an error dialog and an MI error string in 
the gdb console.

What is the use case that made this possible? Partly curious, but 
mostly I need to know whether I should allow the same thing in the 
CDT dialog override (the address-space support feature).

John