Use weld::Frame::set_label directly to set the new text label for the frame in the Calc "Highlight cells..." dialog instead of relying on the internal label child. For the Qt implementation in QtInstanceFrame, there is no separate label child, but its QGroupBox handles the title directly. The dialog can be triggered like this: * start Calc * "Format" -> "Conditional" -> "Condition" -< "Greater than..." Change-Id: I1698902ff88976bd12a4fa9e6116724f36f0dd98 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/208477 Tested-by: Jenkins Reviewed-by: Michael Weghorn <m.weghorn@posteo.de>