Refactor graphics editor and screen editor tab handling

- Updated tab item handling in GraphicsEditor and ScreenEditor to ensure proper opening and closing of tab items.
- Improved layout management by replacing deprecated macros with ImGui table functions for better readability and maintainability.
- Adjusted palette display function signature in color handling to return a boolean for success status instead of absl::Status.
- Enhanced tile rendering functions for consistency and clarity in the graphics editing workflow.

src/app/editor/graphics/graphics_editor.cc

@@ -49,12 +49,13 @@ absl::Status GraphicsEditor::Load() { return absl::OkStatus(); }
 absl::Status GraphicsEditor::Update() {
   if (ImGui::BeginTabBar("##TabBar")) {
     status_ = UpdateGfxEdit();
-    TAB_ITEM("Sheet Browser")
-    if (asset_browser_.Initialized == false) {
-      asset_browser_.Initialize(gfx::Arena::Get().gfx_sheets());
+    if (ImGui::BeginTabItem("Sheet Browser")) {
+      if (asset_browser_.Initialized == false) {
+        asset_browser_.Initialize(gfx::Arena::Get().gfx_sheets());
+      }
+      asset_browser_.Draw(gfx::Arena::Get().gfx_sheets());
+      ImGui::EndTabItem();
     }
-    asset_browser_.Draw(gfx::Arena::Get().gfx_sheets());
-    END_TAB_ITEM()
     status_ = UpdateScadView();
     status_ = UpdateLinkGfxView();
     ImGui::EndTabBar();
@@ -72,17 +73,16 @@ absl::Status GraphicsEditor::UpdateGfxEdit() {
         ImGui::TableSetupColumn(name);
 
       ImGui::TableHeadersRow();
-
-      NEXT_COLUMN();
+      ImGui::TableNextColumn();
       status_ = UpdateGfxSheetList();
 
-      NEXT_COLUMN();
+      ImGui::TableNextColumn();
       if (rom()->is_loaded()) {
         DrawGfxEditToolset();
         status_ = UpdateGfxTabView();
       }
 
-      NEXT_COLUMN();
+      ImGui::TableNextColumn();
       if (rom()->is_loaded()) {
         status_ = UpdatePaletteColumn();
       }
@@ -387,7 +387,7 @@ absl::Status GraphicsEditor::UpdateLinkGfxView() {
 
     ImGui::TableHeadersRow();
 
-    NEXT_COLUMN();
+    ImGui::TableNextColumn();
     link_canvas_.DrawBackground();
     link_canvas_.DrawGrid(16.0f);
 
@@ -402,10 +402,10 @@ absl::Status GraphicsEditor::UpdateLinkGfxView() {
     link_canvas_.DrawOverlay();
     link_canvas_.DrawGrid();
 
-    NEXT_COLUMN();
+    ImGui::TableNextColumn();
     ImGui::Text("Placeholder");
 
-    NEXT_COLUMN();
+    ImGui::TableNextColumn();
     if (ImGui::Button("Load Link Graphics (Experimental)")) {
       if (rom()->is_loaded()) {
         // Load Links graphics from the ROM

src/app/editor/graphics/screen_editor.cc

@@ -73,44 +73,44 @@ absl::Status ScreenEditor::Update() {
 }
 
 void ScreenEditor::DrawInventoryMenuEditor() {
-  TAB_ITEM("Inventory Menu")
+  if (ImGui::BeginTabItem("Inventory Menu")) {
+    static bool create = false;
+    if (!create && rom()->is_loaded()) {
+      status_ = inventory_.Create();
+      palette_ = inventory_.palette();
+      create = true;
+    }
 
-  static bool create = false;
-  if (!create && rom()->is_loaded()) {
-    status_ = inventory_.Create();
-    palette_ = inventory_.palette();
-    create = true;
+    DrawInventoryToolset();
+
+    if (ImGui::BeginTable("InventoryScreen", 3, ImGuiTableFlags_Resizable)) {
+      ImGui::TableSetupColumn("Canvas");
+      ImGui::TableSetupColumn("Tiles");
+      ImGui::TableSetupColumn("Palette");
+      ImGui::TableHeadersRow();
+
+      ImGui::TableNextColumn();
+      screen_canvas_.DrawBackground();
+      screen_canvas_.DrawContextMenu();
+      screen_canvas_.DrawBitmap(inventory_.bitmap(), 2, create);
+      screen_canvas_.DrawGrid(32.0f);
+      screen_canvas_.DrawOverlay();
+
+      ImGui::TableNextColumn();
+      tilesheet_canvas_.DrawBackground(ImVec2(128 * 2 + 2, (192 * 2) + 4));
+      tilesheet_canvas_.DrawContextMenu();
+      tilesheet_canvas_.DrawBitmap(inventory_.tilesheet(), 2, create);
+      tilesheet_canvas_.DrawGrid(16.0f);
+      tilesheet_canvas_.DrawOverlay();
+
+      ImGui::TableNextColumn();
+      gui::DisplayPalette(palette_, create);
+
+      ImGui::EndTable();
+    }
+    ImGui::Separator();
+    ImGui::EndTabItem();
   }
-
-  DrawInventoryToolset();
-
-  if (ImGui::BeginTable("InventoryScreen", 3, ImGuiTableFlags_Resizable)) {
-    ImGui::TableSetupColumn("Canvas");
-    ImGui::TableSetupColumn("Tiles");
-    ImGui::TableSetupColumn("Palette");
-    ImGui::TableHeadersRow();
-
-    ImGui::TableNextColumn();
-    screen_canvas_.DrawBackground();
-    screen_canvas_.DrawContextMenu();
-    screen_canvas_.DrawBitmap(inventory_.bitmap(), 2, create);
-    screen_canvas_.DrawGrid(32.0f);
-    screen_canvas_.DrawOverlay();
-
-    ImGui::TableNextColumn();
-    tilesheet_canvas_.DrawBackground(ImVec2(128 * 2 + 2, (192 * 2) + 4));
-    tilesheet_canvas_.DrawContextMenu();
-    tilesheet_canvas_.DrawBitmap(inventory_.tilesheet(), 2, create);
-    tilesheet_canvas_.DrawGrid(16.0f);
-    tilesheet_canvas_.DrawOverlay();
-
-    ImGui::TableNextColumn();
-    status_ = gui::DisplayPalette(palette_, create);
-
-    ImGui::EndTable();
-  }
-  ImGui::Separator();
-  END_TAB_ITEM()
 }
 
 void ScreenEditor::DrawInventoryToolset() {

src/app/editor/overworld/overworld_editor.cc

@@ -687,7 +687,7 @@ absl::Status OverworldEditor::DrawTile16Selector() {
   {
     blockset_canvas_.DrawContextMenu();
     blockset_canvas_.DrawBitmap(tile16_blockset_.atlas, /*border_offset=*/2,
-                                map_blockset_loaded_);
+                                map_blockset_loaded_, /*scale=*/2);
 
     if (blockset_canvas_.DrawTileSelector(32.0f)) {
       // Open the tile16 editor to the tile