[JENKINS-23391] Widget's pane needs an id for collapsing/expanding

src/main/java/hudson/plugins/nextexecutions/NextExecutionsWidget.java

@@ -76,6 +76,10 @@ public String getWidgetName() {
 
 	}
 
+	public String getWidgetId() {
+		return "next-exec";
+	}
+
 	public boolean showWidget() {
 		return true;
 	}

src/main/java/hudson/plugins/nextexecutions/PossibleNextExecutionsWidget.java

@@ -22,4 +22,9 @@ public boolean showWidget() {
 		DescriptorImpl d = (DescriptorImpl)(Hudson.getInstance().getDescriptorOrDie(NextBuilds.class));
 		return d.getShowPossibleWidget();
 	}
+
+	@Override
+	public String getWidgetId() {
+		return super.getWidgetId() + "-possible";
+	}
 }

src/main/resources/hudson/plugins/nextexecutions/NextExecutionsWidget/index.jelly

@@ -1,6 +1,6 @@
 <j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler" xmlns:d="jelly:define" xmlns:l="/lib/layout" xmlns:t="/lib/hudson" xmlns:f="/lib/form">
 <j:if test="${it.showWidget()}">
-  <l:pane width="2" title="${it.widgetName}">
+  <l:pane width="2" title="${it.widgetName}" id="${it.widgetId}">
     <j:forEach var="w" items="${it.builds}">
       <tr>
         <td><a tooltip="${w.name}" href="${w.url}">${w.shortName}</a></td>