OO-1332: remove empty authors, wording

src/main/java/org/olat/repository/_i18n/LocalStrings_en.properties

@@ -495,7 +495,7 @@ settings.editor=Change description
 sf.notconfigured=No resource folder selected
 sf.resourcetitle=Selected resource folder
 start=start
-start.with.type=start {0}
+start.with.type=Start {0}
 status.closed=Finished (closed)
 status.opened=Active (opened)
 tab.accesscontrol=Access control

src/main/java/org/olat/repository/ui/list/_content/row_1.html

@@ -17,7 +17,7 @@
 				<small>$row.getExternalRef()</small>
 			#end
 		</h4>
-		#if($row.authors)
+		#if($row.authors && !$row.authors.empty)
 			<div class="o_author"><span class="text-muted">$r.translate("course.made.by")</span> $row.authors</div>
 		#end
 		#if($row.lifecycle || $row.lifecycleSoftKey || $row.lifecycleStart || $row.lifecycleEnd)