EEschema, minor fix: avoid modifying frame title after an autosave.

Fixes #8411
https://gitlab.com/kicad/code/kicad/issues/8411

eeschema/files-io.cpp

@@ -931,6 +931,8 @@ bool SCH_EDIT_FRAME::doAutoSave()
     if( !IsWritable( tmp ) )
         return false;
 
+    wxString title = GetTitle();    // Save frame title, that can be modified by the save process
+
     for( size_t i = 0; i < screens.GetCount(); i++ )
     {
         // Only create auto save files for the schematics that have been modified.
@@ -963,6 +965,8 @@ bool SCH_EDIT_FRAME::doAutoSave()
         }
     }
 
+    SetTitle( title );
+
     return autoSaveOk;
 }