Release file before re-loading it for Revert.

Fixes https://gitlab.com/kicad/code/kicad/issues/11481

eeschema/tools/sch_editor_control.cpp

@@ -146,6 +146,7 @@ int SCH_EDITOR_CONTROL::Revert( const TOOL_EVENT& aEvent )
     for( SCH_SCREEN* screen = screenList.GetFirst(); screen; screen = screenList.GetNext() )
         screen->SetContentModified( false );    // do not prompt the user for changes
 
+    m_frame->ReleaseFile();
     m_frame->OpenProjectFiles( std::vector<wxString>( 1, schematic.GetFileName() ) );
 
     return 0;

pcbnew/files.cpp

@@ -380,6 +380,8 @@ bool PCB_EDIT_FRAME::Files_io_from_id( int id )
 
         GetScreen()->SetContentModified( false );    // do not prompt the user for changes
 
+        ReleaseFile();
+
         return OpenProjectFiles( std::vector<wxString>( 1, fn.GetFullPath() ) );
     }