XCOMMONS-774: Impossible to commit a new wiki translation document with proper default language

* Added ability to specify technical pages too

xwiki-platform-core/xwiki-platform-panels/xwiki-platform-panels-ui/pom.xml

@@ -120,4 +120,18 @@
       <scope>runtime</scope>
     </dependency>
   </dependencies>
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.xwiki.commons</groupId>
+        <artifactId>xwiki-commons-tool-xar-plugin</artifactId>
+        <configuration>
+          <!-- The EditTranslations page is not a Translation page and thus not a content page! -->
+          <technicalPages>
+            <technicalPage>EditTranslations\.xml</technicalPage>
+          </technicalPages>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
 </project>

xwiki-platform-core/xwiki-platform-panels/xwiki-platform-panels-ui/src/main/resources/Panels/EditTranslations.xml

@@ -24,7 +24,7 @@
   <web>Panels</web>
   <name>EditTranslations</name>
   <language/>
-  <defaultLanguage>en</defaultLanguage>
+  <defaultLanguage/>
   <translation>0</translation>
   <parent>Panels.WebHome</parent>
   <creator>xwiki:XWiki.Admin</creator>