Fix keyword reference for preference panes "User Interface" and

"Errors/Warnings"

Previously they didn't show up when filtering for "Maven"

Author: kwin

org.eclipse.m2e.core.ui/plugin.xml

@@ -464,13 +464,13 @@
          category="org.eclipse.m2e.core.preferences.Maven2PreferencePage"
          class="org.eclipse.m2e.core.ui.internal.preferences.UserInterfacePreferencePage"
          name="%page.userinterface.name">
-         <keywordReference id="org.eclipse.m2e.maven"/>
+         <keywordReference id="org.eclipse.m2e.core.maven"/>
       </page>
       <page id="org.eclipse.m2e.core.ui.preferences.WarningsPreferencePage"
          category="org.eclipse.m2e.core.preferences.Maven2PreferencePage"
          class="org.eclipse.m2e.core.ui.internal.preferences.WarningsPreferencePage"
          name="%page.warnings.name">
-         <keywordReference id="org.eclipse.m2e.maven"/>
+         <keywordReference id="org.eclipse.m2e.core.maven"/>
      </page>
       <page id="org.eclipse.m2e.core.preferences.LifecycleMappingPreferencePag"
             class="org.eclipse.m2e.core.ui.internal.preferences.LifecycleMappingPreferencePage"