fix(src/components/codecs/AbstractCodecsModel): little fixes

linphone-desktop/src/components/codecs/AbstractCodecsModel.cpp

@@ -143,7 +143,7 @@ bool AbstractCodecsModel::moveRows (
   // Update linphone codecs list.
   list<shared_ptr<linphone::PayloadType> > codecs;
   for (const auto &map : m_codecs)
-    codecs.push_back(map.value("__codec").value<shared_ptr<linphone::PayloadType> >());
+    codecs.push_back(getCodecFromMap(map));
   updateCodecs(codecs);
 
   endMoveRows();

linphone-desktop/ui/modules/Linphone/Codecs/CodecsViewer.qml

@@ -149,6 +149,7 @@ Column {
 
           NumericField {
             Layout.preferredWidth: CodecsViewerStyle.column.bitrateWidth
+            readOnly: !$codec.isVbr
             text: $codec.bitrate
 
             onEditingFinished: view.model.setBitrate(index, text)