Revert "Qt: escape demuxdump filename (refs #19841)"

This reverts commit 2de830a5.
Fix #20026

modules/gui/qt/dialogs/convert.cpp

@@ -178,13 +178,10 @@ void ConvertDialog::close()
     for(int i = 0; i < incomingMRLs->length(); i++)
     {
         QString mrl;
-        QString newFileName;
 
         if( dumpRadio->isChecked() )
         {
-            newFileName = fileLine->text();
-            newFileName.replace( QChar('\''), "\\\'" );
-            mrl = QString( "demux=dump :demuxdump-file='%1'" ).arg( newFileName );
+            mrl = "demux=dump :demuxdump-file=" + fileLine->text();
         }
         else
         {
@@ -196,6 +193,8 @@ void ConvertDialog::close()
             }
             mrl += ":";
 
+            QString newFileName;
+
             // Only one file, use the destination provided
             if(singleFileSelected)
             {