add support for suspend button. resolves T112

debian/changelog

@@ -1,3 +1,9 @@
+lubuntu-artwork (19.04.3) eoan; urgency=medium
+
+  * Add support for suspend button.
+
+ -- Walter Lapchynski <wxl@ubuntu.com>  Sat, 17 Aug 2019 14:38:36 -0700
+
 lubuntu-artwork (19.04.2) disco; urgency=medium
 
   * Provide lxqt-branding so the Debian LXQt branding is not pulled in.

src/usr/share/sddm/themes/lubuntu/Main.qml

@@ -221,13 +221,22 @@ Rectangle {
 			dateFont.pixelSize: 12
         	}
 
+			ImageButton {
+			id: btnSuspend
+			height: parent.height
+			source: "suspend.png"
+			visible: sddm.canSuspend
+			onClicked: sddm.suspend()
+			KeyNavigation.backtab: layoutBox; KeyNavigation.tab: btnReboot
+			}
+
 			ImageButton {
 			id: btnReboot
 			height: parent.height
 			source: "reboot.png"
 			visible: sddm.canReboot
 			onClicked: sddm.reboot()
-			KeyNavigation.backtab: layoutBox; KeyNavigation.tab: btnShutdown
+			KeyNavigation.backtab: btnSuspend; KeyNavigation.tab: btnShutdown
 			}
 
 			ImageButton {