[ui] fix layout issue: ensure the fit is updated

Without this fix, the width side is initialize correctly but not updated
when the window is resized.

Author: fabiencastan

meshroom/ui/qml/Application.qml

@@ -985,15 +985,15 @@ Page {
         NodeChunks {
             id: chunksListView
             height: 6
-            width: parent.width
+            Layout.fillWidth: true
             model: _reconstruction ? _reconstruction.sortedDFSChunks : null
             highlightChunks: false
         }
 
         MSplitView {
             id: topBottomSplit
             Layout.fillHeight: true
-            width: parent.width
+            Layout.fillWidth: true
 
             orientation: Qt.Vertical