Allow uploading additional stickers

resources/qml/ScrollHelper.qml

@@ -23,6 +23,9 @@ MouseArea {
     // console.warn("Delta: ", wheel.pixelDelta.y);
     // console.warn("Old position: ", flickable.contentY);
     // console.warn("New position: ", newPos);
+    // breaks ListView's with headers...
+    //if (typeof (flickableItem.headerItem) !== "undefined" && flickableItem.headerItem)
+    //    minYExtent += flickableItem.headerItem.height;
 
     id: root
 
@@ -30,10 +33,6 @@ MouseArea {
     property alias enabled: root.enabled
 
     function calculateNewPosition(flickableItem, wheel) {
-        // breaks ListView's with headers...
-        //if (typeof (flickableItem.headerItem) !== "undefined" && flickableItem.headerItem)
-        //    minYExtent += flickableItem.headerItem.height;
-
         //Nothing to scroll
         if (flickableItem.contentHeight < flickableItem.height)
             return flickableItem.contentY;

resources/qml/dialogs/ImagePackEditorDialog.qml

@@ -4,6 +4,7 @@
 
 import ".."
 import "../components"
+import Qt.labs.platform 1.1
 import QtQuick 2.12
 import QtQuick.Controls 2.12
 import QtQuick.Layouts 1.12
@@ -78,6 +79,23 @@ ApplicationWindow {
 
                 }
 
+                footer: Button {
+                    palette: Nheko.colors
+                    onClicked: addFilesDialog.open()
+                    width: ListView.view.width
+                    text: qsTr("Add images")
+
+                    FileDialog {
+                        id: addFilesDialog
+
+                        folder: StandardPaths.writableLocation(StandardPaths.PicturesLocation)
+                        fileMode: FileDialog.OpenFiles
+                        nameFilters: [qsTr("Stickers (*.png *.webp)")]
+                        onAccepted: imagePack.addStickers(files)
+                    }
+
+                }
+
                 delegate: AvatarListTile {
                     id: packItem