[tabbox] Fix key navigation in icons based tabbox

tabbox/qml/IconTabBox.qml

@@ -23,6 +23,12 @@ import org.kde.kquickcontrolsaddons 2.0
 
 Item {
     id: iconsTabBox
+    function decrementCurrentIndex() {
+        iconsListView.decrementCurrentIndex();
+    }
+    function incrementCurrentIndex() {
+        iconsListView.incrementCurrentIndex();
+    }
     property int iconSize
     property alias count: iconsListView.count
     property alias margins: hoverItem.margins
@@ -92,16 +98,4 @@ Item {
         highlightMoveDuration: 250
         boundsBehavior: Flickable.StopAtBounds
     }
-    /*
-     * Key navigation on outer item for two reasons:
-     * @li we have to emit the change signal
-     * @li on multiple invocation it does not work on the list view. Focus seems to be lost.
-     **/
-    Keys.onPressed: {
-        if (event.key == Qt.Key_Left) {
-            iconsListView.decrementCurrentIndex();
-        } else if (event.key == Qt.Key_Right) {
-            iconsListView.incrementCurrentIndex();
-        }
-    }
 }

tabbox/qml/clients/big_icons/contents/ui/main.qml

@@ -102,6 +102,18 @@ KWin.Switcher {
                     }
                 }
             }
+            /*
+            * Key navigation on outer item for two reasons:
+            * @li we have to emit the change signal
+            * @li on multiple invocation it does not work on the list view. Focus seems to be lost.
+            **/
+            Keys.onPressed: {
+                if (event.key == Qt.Key_Left) {
+                    icons.decrementCurrentIndex();
+                } else if (event.key == Qt.Key_Right) {
+                    icons.incrementCurrentIndex();
+                }
+            }
         }
     }
 }

tabbox/qml/clients/small_icons/contents/ui/main.qml

@@ -83,6 +83,18 @@ KWin.Switcher {
                     }
                 }
             }
+            /*
+            * Key navigation on outer item for two reasons:
+            * @li we have to emit the change signal
+            * @li on multiple invocation it does not work on the list view. Focus seems to be lost.
+            **/
+            Keys.onPressed: {
+                if (event.key == Qt.Key_Left) {
+                    icons.decrementCurrentIndex();
+                } else if (event.key == Qt.Key_Right) {
+                    icons.incrementCurrentIndex();
+                }
+            }
         }
     }
 }