refocus the presentation item

This command sets the keyboard focus to the presentation item which
controls when slides are changed. It ensures that after every action
you can use the arrow keys to switch the slides.

src/qml/presenter/MainWindow.qml

@@ -241,9 +241,9 @@ Controls.Page {
                 imageEditor.visible = false;
                 presentationEditor.visible = false;
                 presentation.visible = true;
-                presentation.focusTimer = true;
                 currentWindow = presentation;
                 editMode = false;
+                refocusPresentation();
             }
         } else {
             videoEditor.visible = false;
@@ -252,10 +252,10 @@ Controls.Page {
             imageEditor.visible = false;
             presentationEditor.visible = false;
             presentation.visible = true;
-            presentation.focusTimer = true;
             currentWindow = presentation;
             editMode = false;
             presenting = true;
+            refocusPresentation();
         }
     }
 
@@ -276,4 +276,9 @@ Controls.Page {
         presentation.slide.seek(pos);
         pWindow.slide.seek(pos);
     }
+
+    function refocusPresentation() {
+        presentation.forceActiveFocus();
+        presentation.focusTimer = true;
+    }
 }

src/qml/presenter/ServiceList.qml

@@ -250,6 +250,7 @@ Item {
                                         serviceItemList.currentIndex = index;
                                         ServiceItemModel.select(index);
                                     }
+                                    refocusPresentation();
                                 }
 
                                 onDoubleClicked: {