Use dialogs from qt labs platform and fix a image downloading bug.

imports/Spectral/Component/Timeline/FileDelegate.qml

@@ -153,9 +153,9 @@ ColumnLayout {
                     }
 
                     Component {
-                        id: openFileDialog
+                        id: openFolderDialog
 
-                        OpenFileDialog {}
+                        OpenFolderDialog {}
                     }
 
                     Component {
@@ -169,15 +169,15 @@ ColumnLayout {
     }
 
     function saveFileAs() {
-        var fileDialog = openFileDialog.createObject(ApplicationWindow.overlay, {"selectFolder": true})
+        var folderDialog = openFolderDialog.createObject(ApplicationWindow.overlay)
 
-        fileDialog.chosen.connect(function(path) {
+        folderDialog.chosen.connect(function(path) {
             if (!path) return
 
             currentRoom.downloadFile(eventId, path + "/" + (content.filename || content.body))
         })
 
-        fileDialog.open()
+        folderDialog.open()
     }
 
     function downloadAndOpen()

imports/Spectral/Component/Timeline/ImageDelegate.qml

@@ -27,8 +27,14 @@ ColumnLayout {
     spacing: 0
 
     onDownloadedChanged: {
-        if (downloaded && showOnFinished) showSavedFile()
+        if (downloaded && showOnFinished) {
-        if (downloaded && openOnFinished) openSavedFile()
+            showSavedFile()
+            showOnFinished = false
+        }
+        if (downloaded && openOnFinished) {
+            openSavedFile()
+            openOnFinished = false
+        }
     }
 
     Label {
@@ -183,9 +189,9 @@ ColumnLayout {
                 }
 
                 Component {
-                    id: openFileDialog
+                    id: openFolderDialog
 
-                    OpenFileDialog {}
+                    OpenFolderDialog {}
                 }
 
                 Component {
@@ -204,15 +210,15 @@ ColumnLayout {
     }
 
     function saveFileAs() {
-        var fileDialog = openFileDialog.createObject(ApplicationWindow.overlay, {"selectFolder": true})
+        var folderDialog = openFolderDialog.createObject(ApplicationWindow.overlay)
 
-        fileDialog.chosen.connect(function(path) {
+        folderDialog.chosen.connect(function(path) {
             if (!path) return
 
             currentRoom.downloadFile(eventId, path + "/" + (content.filename || content.body))
         })
 
-        fileDialog.open()
+        folderDialog.open()
     }
 
     function downloadAndShow()

imports/Spectral/Dialog/OpenFileDialog.qml

@@ -1,5 +1,5 @@
 import QtQuick 2.12
-import QtQuick.Dialogs 1.2
+import Qt.labs.platform 1.1
 
 FileDialog {
     signal chosen(string path)
@@ -7,7 +7,6 @@ FileDialog {
     id: root
 
     title: "Please choose a file"
-    selectMultiple: false
 
-    onAccepted: chosen(selectFolder ? folder : fileUrl)
+    onAccepted: chosen(file)
 }

imports/Spectral/Dialog/OpenFolderDialog.qml

@@ -0,0 +1,12 @@
+import QtQuick 2.12
+import Qt.labs.platform 1.1
+
+FolderDialog {
+    signal chosen(string path)
+
+    id: root
+
+    title: "Please choose a folder"
+
+    onAccepted: chosen(folder)
+}

imports/Spectral/Dialog/qmldir

@@ -10,3 +10,4 @@ AcceptInvitationDialog 2.0 AcceptInvitationDialog.qml
 FontFamilyDialog 2.0 FontFamilyDialog.qml
 AccountDetailDialog 2.0 AccountDetailDialog.qml
 OpenFileDialog 2.0 OpenFileDialog.qml
+OpenFolderDialog 2.0 OpenFolderDialog.qml

res.qrc

@@ -56,5 +56,6 @@
         <file>imports/Spectral/Dialog/FontFamilyDialog.qml</file>
         <file>imports/Spectral/Dialog/AccountDetailDialog.qml</file>
         <file>imports/Spectral/Dialog/OpenFileDialog.qml</file>
+        <file>imports/Spectral/Dialog/OpenFolderDialog.qml</file>
     </qresource>
 </RCC>