show recipes visually instead of describing them in text

src/ui/SchematicChoiceDialog.h

@@ -7,14 +7,19 @@
 #include "SchematicChoiceOption.h"
 
 struct RecipesConfig;
+class BuildingIconCache;
+class ItemIconCache;
 
 class SchematicChoiceDialog : public QDialog
 {
     Q_OBJECT
 
 public:
+    // The icon caches draw the recipe lines of the "Unlocks recipes" list
+    // (REQ-DEF-SCHEMATIC-DROP, REQ-UI-ITEM-ICON, REQ-UI-BUILD-ICON). Not owned.
     SchematicChoiceDialog(const std::vector<SchematicChoiceOption>& options,
-                          const RecipesConfig& recipes,
+                          const RecipesConfig& recipes, ItemIconCache* itemIcons,
+                          BuildingIconCache* buildingIcons,
                           QWidget* parent = nullptr);
 
     int getChosenIndex() const;