Set unsaved changes when pasting metatiles

CHANGELOG.md

@@ -25,6 +25,7 @@ The **"Breaking Changes"** listed below are changes that have been made in the d
 - Fix `File -> Open Project` not resolving folder shortcuts.
 - Fix bug where "Requires Itemfinder" checkbox is being checked by wrong data.
 - Fix the map border not immediately reflecting Tileset Editor changes.
+- Fix pasting metatiles in the Tileset Editor not triggering the unsaved changes warning.
 
 ## [5.0.0] - 2022-10-30
 ### Breaking Changes

src/ui/tileseteditor.cpp

@@ -917,6 +917,7 @@ void TilesetEditor::pasteMetatile(const Metatile * toPaste)
 
     MetatileHistoryItem *commit = new MetatileHistoryItem(metatileId, prevMetatile, new Metatile(*this->metatile));
     metatileHistory.push(commit);
+    this->hasUnsavedChanges = true;
 }
 
 void TilesetEditor::on_actionExport_Primary_Tiles_Image_triggered()