effects/overview: Move Escape key handling to ScreenView

With this, no individual component has to handle the Escape key to
deactivate the effect.

src/effects/overview/qml/DesktopBar.qml

@@ -201,6 +201,7 @@ Item {
                             id: editor
                             anchors.fill: parent
                             visible: label.state == "editing"
+                            focus: visible
                             topPadding: 0
                             bottomPadding: 0
                             text: delegate.desktop.name
@@ -226,7 +227,6 @@ Item {
                         }
                         function stopEditing() {
                             state = "normal";
-                            searchField.forceActiveFocus();
                         }
                     }
 

src/effects/overview/qml/ScreenView.qml

@@ -27,6 +27,8 @@ FocusScope {
         container.organized = false;
     }
 
+    Keys.onEscapePressed: effect.deactivate();
+
     Repeater {
         model: KWinComponents.ClientFilterModel {
             activity: KWinComponents.Workspace.currentActivity

src/effects/overview/qml/WindowHeap.qml

@@ -428,9 +428,6 @@ FocusScope {
 
     Keys.onPressed: {
         switch (event.key) {
-        case Qt.Key_Escape:
-            effect.deactivate();
-            break;
         case Qt.Key_Up:
             selectNextItem(WindowHeap.Direction.Up);
             break;