Merge pull request #7060 from ales-erjavec/owhierarchicalclustering-combo-width

owhierarchicalclustering: Fix combo box size hinting

Author: janezd

Orange/widgets/unsupervised/owhierarchicalclustering.py

@@ -304,7 +304,9 @@ def on_annotation_changed(value):
             None, self, "color_by", orientation=Qt.Horizontal,
             model=model, callback=self._update_labels,
             sizePolicy=QSizePolicy(QSizePolicy.MinimumExpanding,
-                                   QSizePolicy.Fixed))
+                                   QSizePolicy.Fixed),
+            contentsLength=10
+        )
         self.color_by_label = QLabel("Color by:")
         grid.addWidget(self.color_by_label, 2, 0)
         grid.addWidget(cb, 2, 1)