[KPropertiesDialog] Avoid layout shift when interrupting size calculation
Adds a line-break after the "At least ..." label, like was done with the "Calculating..." one
Mind the string-freeze, don't merge this before 5 Feb
Adds a line-break after the "At least ..." label, like was done with the "Calculating..." one
Mind the string-freeze, don't merge this before 5 Feb