reword "New Issues" to "Creation Date"

sonar-core/src/main/resources/org/sonar/l10n/core.properties

@@ -765,7 +765,7 @@ issues.facet.tags=Tag
 issues.facet.rules=Rule
 issues.facet.resolutions=Resolution
 issues.facet.languages=Language
-issues.facet.createdAt=New Issues
+issues.facet.createdAt=Creation Date
 issues.facet.createdAt.or=Or:
 issues.facet.createdAt.all=All
 issues.facet.createdAt.last_week=Last week