Replace recipe/schematic dropdowns with button and selection dialog

src/ui/SelectedBuildingPanel.h

@@ -26,7 +26,6 @@ class Simulation;
 class ShipLayoutPreview;
 class ShipStatsPanel;
 class QLabel;
-class QComboBox;
 class QListWidget;
 class QPushButton;
 class QVBoxLayout;
@@ -51,7 +50,7 @@ private:
     void handleEvent(std::shared_ptr<const DebugDrawToggledEvent> event) override;
 
 private slots:
-    void onRecipeChanged(int comboIndex);
+    void onSelectRecipeClicked();
     void onClearBelt();
     void onSplitterFilterChanged();
 
@@ -75,7 +74,7 @@ private:
 
     QVBoxLayout* m_layout;
     QLabel*      m_titleLabel;
-    QComboBox*   m_recipeCombo;
+    QPushButton* m_recipeSelectButton;
     QPushButton* m_clearBeltBtn;
     QLabel*      m_filterALabel;
     QListWidget* m_filterAList;