Fix QML FileDialog file size overflow

Since an int is too small to store the file size we use a
string instead.

Fixes: QTBUG-119005
Pick-to: 6.6 6.5
Change-Id: I9b9a8724e8a1ca26b482396fb8a62aab206898cf
Reviewed-by: Oliver Eftevaag <oliver.eftevaag@qt.io>

src/quickdialogs/quickdialogsquickimpl/qml/+Fusion/FileDialogDelegate.qml

@@ -34,7 +34,7 @@ DialogsQuickImpl.FileDialogDelegate {
     required property int index
     required property string fileName
     required property url fileUrl
-    required property int fileSize
+    required property string fileSize
     required property date fileModified
     required property bool fileIsDir
 

src/quickdialogs/quickdialogsquickimpl/qml/+Imagine/FileDialogDelegate.qml

@@ -39,7 +39,7 @@ DialogsQuickImpl.FileDialogDelegate {
     required property int index
     required property string fileName
     required property url fileUrl
-    required property int fileSize
+    required property string fileSize
     required property date fileModified
     required property bool fileIsDir
 

src/quickdialogs/quickdialogsquickimpl/qml/+Material/FileDialogDelegate.qml

@@ -31,7 +31,7 @@ DialogsQuickImpl.FileDialogDelegate {
     required property int index
     required property string fileName
     required property url fileUrl
-    required property int fileSize
+    required property string fileSize
     required property date fileModified
     required property bool fileIsDir
 

src/quickdialogs/quickdialogsquickimpl/qml/+Universal/FileDialogDelegate.qml

@@ -32,7 +32,7 @@ DialogsQuickImpl.FileDialogDelegate {
     required property int index
     required property string fileName
     required property url fileUrl
-    required property int fileSize
+    required property string fileSize
     required property date fileModified
     required property bool fileIsDir
 

src/quickdialogs/quickdialogsquickimpl/qml/FileDialogDelegate.qml

@@ -34,7 +34,7 @@ DialogsQuickImpl.FileDialogDelegate {
     required property int index
     required property string fileName
     required property url fileUrl
-    required property int fileSize
+    required property string fileSize
     required property date fileModified
     required property bool fileIsDir