put gwt-user dependency to the beginning of the gwt.ui artifact's dependency list

java/com.sap.sailing.gwt.ui/pom.xml

@@ -25,6 +25,15 @@
   </repositories>
 
   <dependencies>
+    <!-- The following dependency needs re-declaration with the desired version because
+         gwt-maps-api declares it with no version specifier which may be resolved to an
+         incorrect version.
+      -->
+    <dependency>
+      <groupId>com.google.gwt</groupId>
+      <artifactId>gwt-user</artifactId>
+      <version>${gwt.version}</version>
+    </dependency>
     <dependency>
       <groupId>javax.validation</groupId>
       <artifactId>validation-api</artifactId>
@@ -110,15 +119,6 @@
       <version>1.0.0-SNAPSHOT</version>
       <classifier>sources</classifier>
     </dependency>
-    <!-- The following dependency needs re-declaration with the desired version because
-         gwt-maps-api declares it with no version specifier which may be resolved to an
-         incorrect version.
-      -->
-    <dependency>
-      <groupId>com.google.gwt</groupId>
-      <artifactId>gwt-user</artifactId>
-      <version>${gwt.version}</version>
-    </dependency>
   </dependencies>
 
   <build>