endSessionDialog.js: Don't close the dialog immediately when

selecting 'suspend' or 'hibernate'.

This was preventing the session manager from responding with an
inhibitor list and giving the user the option to ignore them and
'force' the action, as happens correctly with other options. It
was also breaking the lifecycle of this dialog and disable it
from showing again.

Also fix an issue with the inhibitor list not clearing existing
items when receiving an updated list from the session manager.

Fixes linuxmint/cinnamon-session#193.

Author: mtwebster

js/ui/endSessionDialog.js

@@ -155,20 +155,14 @@ class EndSessionDialog extends ModalDialog.ModalDialog {
                 if (canSuspend) {
                     this.addButton({
                         label: _("Suspend"),
-                        action: () => {
-                            this._dialogProxy.SuspendRemote();
-                            this.close();
-                        },
+                        action: this._dialogProxy.SuspendRemote.bind(this._dialogProxy),
                     });
                 }
 
                 if (canHibernate) {
                     this.addButton({
                         label: _("Hibernate"),
-                        action: () => {
-                            this._dialogProxy.HibernateRemote();
-                            this.close();
-                        }
+                        action: this._dialogProxy.HibernateRemote.bind(this._dialogProxy),
                     });
                 }
 
@@ -278,6 +272,7 @@ class EndSessionDialog extends ModalDialog.ModalDialog {
     _presentInhibitorInfo(inhibitorInfos) {
         this._removeDelayTimer();
         this.clearButtons();
+        this._applicationsSection.list.destroy_all_children();
         this._messageDialogContent.description = null;
 
         const infos = inhibitorInfos;