OO-1169: fix the unremovable deleted course element information (and beautify it)

src/main/java/org/olat/course/editor/EditorMainController.java

@@ -228,7 +228,8 @@ public class EditorMainController extends MainLayoutBasicController implements G
 			} else {
 				ICourse course = CourseFactory.openCourseEditSession(ores.getResourceableId());
 				main = createVelocityContainer("index");
-				main.setDomReplacementWrapperRequired(false);
+				//must be true for deleted course node
+				main.setDomReplacementWrapperRequired(true);
 				
 				OLATResourceable courseOres = OresHelper.createOLATResourceableInstance("CourseModule", ores.getResourceableId());
 				RepositoryEntry repo = RepositoryManager.getInstance().lookupRepositoryEntry(courseOres, false);

src/main/java/org/olat/course/editor/_content/index.html

-<div id="$r.getCId()" class="o_course_editor">
+<div class="o_course_editor">
 #if($courseNode)
 <div class="o_titled_wrapper">
 	<h2>
@@ -16,5 +16,4 @@
 	$r.translate("course.building.block.disabled")<br/><br/>
 	$r.render("alternative")
 #end
-
 </div>##END o_course_editor
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src/main/java/org/olat/course/editor/_content/undeletenode.html

-<h4>$r.translate("undeletenode.header")</h4>
-<p>
-	$r.translate("undeletenode.message")
-</p>
-<p>
+<h2><i class="o_icon o_icon_delete_item"> </i> $r.translate("undeletenode.header")</h2>
+<div class="o_info">$r.translate("undeletenode.message")</div>
+<div class="o_button_group">
 	$r.render("undeletenode.button")
-</p>
-#if($targetSelection)
-	<p>
+	#if($targetSelection)
 		$r.render("insertTargetSelection")
-	</p>
-#end
\ No newline at end of file
+	#end
+</div>
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