[app] Don't auto-scroll storage view if it's not visible

User expects to return to the same place where he/she opened the book
or the settings page.

app/qml/BooksMainPage.qml

@@ -40,8 +40,8 @@ Page {
 
     allowedOrientations: window.allowedOrientations
 
-    //property variant shelf
     property variant currentShelf: storageView.currentShelf
+    readonly property bool pageActive: status === PageStatus.Active
 
     property Item _bookView
 
@@ -63,7 +63,7 @@ Page {
             opacity: book ? 1 : 0
             visible: opacity > 0
             orientation: root.orientation
-            pageActive: root.status === PageStatus.Active
+            pageActive: root.pageActive
             book: Settings.currentBook ? Settings.currentBook : null
             onCloseBook: Settings.currentBook = null
             Behavior on opacity { FadeAnimation {} }
@@ -73,6 +73,7 @@ Page {
     BooksStorageView {
         id: storageView
         anchors.fill: parent
+        pageActive: root.pageActive
         opacity: Settings.currentBook ? 0 : 1
         visible: opacity > 0
         Behavior on opacity { FadeAnimation {} }

app/qml/BooksStorageView.qml

@@ -37,8 +37,10 @@ import harbour.books 1.0
 
 SilicaFlickable {
     id: storageView
+
     interactive: !dragInProgress
 
+    property bool pageActive
     property bool editMode: false
 
     signal openBook(var book)
@@ -156,7 +158,12 @@ SilicaFlickable {
         // Show the contents of SD-card and let use know that he can switch
         // between the internal memory and the removable storage by swiping
         // the list horizontally
-        onNewStorage: storageList.scrollToPage(index)
+        onNewStorage: {
+            if (pageActive && storageView.visible) {
+                console.log("showing SD card contents")
+                storageList.scrollToPage(index)
+            }
+        }
     }
 
     ListWatcher {