Save ERC settings (including exclusions) when saving file.

Fixes https://gitlab.com/kicad/code/kicad/-/issues/15274

(cherry picked from commit 10ed1d1a7f)

eeschema/eeschema_config.cpp

@@ -164,7 +164,8 @@ void SCH_EDIT_FRAME::saveProjectSettings()
 
 void SCH_EDIT_FRAME::SaveProjectLocalSettings()
 {
-    // No schematic local settings yet
+    if( m_schematic )
+        m_schematic->RecordERCExclusions();
 }
 
 

eeschema/files-io.cpp

@@ -696,6 +696,17 @@ bool SCH_EDIT_FRAME::saveSchematicFile( SCH_SHEET* aSheet, const wxString& aSave
     if( !IsWritable( schematicFileName ) )
         return false;
 
+    wxFileName projectFile( schematicFileName );
+
+    projectFile.SetExt( ProjectFileExtension );
+
+    if( projectFile.FileExists() )
+    {
+        // Save various ERC settings, such as violation severities (which may have been edited
+        // via the ERC dialog as well as the Schematic Setup dialog), ERC exclusions, etc.
+        saveProjectSettings();
+    }
+
     wxString tempFile = wxFileName::CreateTempFileName( wxS( "eeschema" ) );
 
     // Save