Add dividing line for tilesets in Tileset Editor

include/config.h

@@ -68,6 +68,7 @@ public:
         this->showGrid = false;
         this->showTilesetEditorMetatileGrid = false;
         this->showTilesetEditorLayerGrid = true;
+        this->showTilesetEditorDivider = false;
         this->monitorFiles = true;
         this->tilesetCheckerboardFill = true;
         this->theme = "default";
@@ -119,6 +120,7 @@ public:
     bool showGrid;
     bool showTilesetEditorMetatileGrid;
     bool showTilesetEditorLayerGrid;
+    bool showTilesetEditorDivider;
     bool monitorFiles;
     bool tilesetCheckerboardFill;
     QString theme;

include/ui/tileseteditor.h

@@ -88,6 +88,7 @@ private slots:
     void on_actionShow_UnusedTiles_toggled(bool checked);
     void on_actionMetatile_Grid_triggered(bool checked);
     void on_actionLayer_Grid_triggered(bool checked);
+    void on_actionShow_Tileset_Divider_triggered(bool checked);
 
     void on_actionUndo_triggered();
 

include/ui/tileseteditormetatileselector.h

@@ -23,7 +23,8 @@ public:
     QVector<uint16_t> usedMetatiles;
     bool selectorShowUnused = false;
     bool selectorShowCounts = false;
-    bool showGrid;
+    bool showGrid = false;
+    bool showDivider = false;
 
 protected:
     void mousePressEvent(QGraphicsSceneMouseEvent*);
@@ -44,6 +45,7 @@ private:
     int numRows(int numMetatiles);
     int numRows();
     void drawGrid();
+    void drawDivider();
     void drawFilters();
     void drawUnused();
     void drawCounts();

include/ui/tileseteditortileselector.h

@@ -33,6 +33,7 @@ public:
 
     QVector<uint16_t> usedTiles;
     bool showUnused = false;
+    bool showDivider = false;
 
 protected:
     void mousePressEvent(QGraphicsSceneMouseEvent*);