Typo: it's -> its (twice)

Typo: should be have -> should have

where is the pointer column defined?

maskingChanged is nowhere called in your patch.

this new function can be made private.

where is this signal consumed?

do I see it correctly that with this patch the connection of a column with a curve is lost if the column is renamed? At the moment it's possible to rename the columns (for example from "my great y-data" to "my great and fancy y-data") without affecting the curves - is this not possible anymore since we work now with your patch with names and not with the pointers anymore?

at the beginning of the function:

void Project::descriptionChanged(const AbstractAspect* aspect) {
if (isLoading())

		return;

if (this != aspect) {

		const AbstractColumn* column = dynamic_cast<const AbstractColumn*>(aspect);

In macrosXYCurve.h
it is connected to ColumnAboutToBeRemoved

This makes the call of reset() from the column. This signal is connected to ColumnAboutToBeRemoved in XYCurve
see macrosXYCurve.h

template instead of a macro would be better, but I don't know how to create one in this case