fix issue where the selection panel sometimes collapses to very small size

src/ui/selection/ItemChipRow.cpp

@@ -73,6 +73,11 @@ void ItemChipRow::rebuildChips(const std::vector<Entry>& entries)
         ItemChip* chip = new ItemChip(icon, this);
         m_layout->addWidget(chip, static_cast<int>(index) / kChipsPerRow,
                             static_cast<int>(index) % kChipsPerRow);
+        // Shown right away, because the panel measures itself as soon as this returns. A
+        // widget created under an already-visible parent starts hidden, and a layout
+        // treats a hidden item as empty, so an unshown chip would add nothing to the
+        // size hint and the panel would be fitted to a buffer section that looks empty.
+        chip->show();
         m_chips.push_back(chip);
     }
 }