XWIKI-22368: UIExtensionClass imported properties removed after editing and rolling back

  * Add missing dependencies to ensure needed xclass are there in the
    demo package

(cherry picked from commit 4ef604e5)

xwiki-platform-distribution/xwiki-platform-distribution-flavor/xwiki-platform-distribution-flavor-data/pom.xml

@@ -94,6 +94,18 @@
               <artifactId>xwiki-platform-rendering-wikimacro-store</artifactId>
               <version>${project.version}</version>
             </dependency>
+            <!-- UIExtensionClass is automatically generated -->
+            <dependency>
+              <groupId>org.xwiki.platform</groupId>
+              <artifactId>xwiki-platform-uiextension-api</artifactId>
+              <version>${project.version}</version>
+            </dependency>
+            <!-- PanelClass is automatically generated -->
+            <dependency>
+              <groupId>org.xwiki.platform</groupId>
+              <artifactId>xwiki-platform-panels-api</artifactId>
+              <version>${project.version}</version>
+            </dependency>
             <!-- Instance module has its own Hibernate mapping file -->
             <dependency>
               <groupId>org.xwiki.platform</groupId>