[Bug]: Variables with sigil sufix (e.g. a$) do now show up in the debugger

### Contact Details

@boriel

### IDE version

All

### What happened?

Debugging a code like this:
```basic
DIM a$ As String
LET a$ = "Hola"
LET a$ = a$ + " Mundo"
PRINT a$
```

do not shows up the value of `a$` in the debugger.
But using just `a` works.


### Error and Warning messages

```shell
None
```

### Code of Conduct

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