Eeschema: ensure component edit flags are cleared after loading a schematic file.

Fixes #4515
https://gitlab.com/kicad/code/kicad/issues/4515

eeschema/sch_component.cpp

@@ -1182,6 +1182,11 @@ void SCH_COMPONENT::GetMsgPanelInfo( EDA_DRAW_FRAME* aFrame, MSG_PANEL_ITEMS& aL
 
             aList.push_back( MSG_PANEL_ITEM( msg, GetField( VALUE )->GetShownText(), DARKCYAN ) );
 
+#if 0       // Display component flags, for debug only
+            aList.push_back( MSG_PANEL_ITEM( _( "flags" ),
+                             wxString::Format("%X", GetEditFlags()), BROWN ) );
+#endif
+
             // Display component reference in library and library
             aList.push_back( MSG_PANEL_ITEM( _( "Name" ), GetLibId().GetLibItemName(), BROWN ) );
 

eeschema/sch_sexpr_parser.cpp

@@ -2193,6 +2193,9 @@ SCH_COMPONENT* SCH_SEXPR_PARSER::parseSchematicSymbol()
     if( !libName.IsEmpty() && ( symbol->GetLibId().Format().wx_str() != libName ) )
         symbol->SetSchSymbolLibraryName( libName );
 
+    // Ensure edit/status flags are cleared after these initializations:
+    symbol->ClearFlags();
+
     return symbol.release();
 }