Fix data recovery about sprite user data

src/app/crash/read_document.cpp

@@ -381,9 +381,23 @@ private:
         spr->setGridBounds(gridBounds);
     }
 
+    // Read Sprite User Data
+    if (!s.eof()) {
+      UserData userData = readUserData(s);
+      if (!userData.isEmpty())
+        spr->setUserData(userData);
+    }
+
     return spr.release();
   }
 
+  UserData readUserData(std::ifstream& s) {
+    UserData userData;
+    userData.setText(read_string(s));
+    userData.setColor(read32(s));
+    return userData;
+  }
+
   gfx::ColorSpaceRef readColorSpace(std::ifstream& s) {
     const gfx::ColorSpace::Type type = (gfx::ColorSpace::Type)read16(s);
     const gfx::ColorSpace::Flag flags = (gfx::ColorSpace::Flag)read16(s);

src/app/crash/write_document.cpp

@@ -194,6 +194,15 @@ private:
     // Grid bounds
     writeGridBounds(s, spr->gridBounds());
 
+    // Write Sprite User Data
+    writeUserData(s, spr->userData());
+
+    return true;
+  }
+
+  bool writeUserData(std::ofstream& s, const UserData& userData) {
+    write_string(s, userData.text());
+    write32(s, (uint32_t)userData.color());
     return true;
   }