Mesh: Issue #0004473: Expose openCommand() to translation

Continuing the work to expose the undo/redo functionality to translation. This commit does so for the Mesh Wb.  
Ticket: https://tracker.freecadweb.org/view.php?id=4473

src/Mod/Mesh/Gui/RemoveComponents.cpp

@@ -127,7 +127,7 @@ void RemoveComponents::deleteSelection()
     Gui::Document* doc = Gui::Application::Instance->activeDocument();
     if (!doc) return;
     // delete all selected faces
-    doc->openCommand("Delete selection");
+    doc->openCommand(QT_TRANSLATE_NOOP("Command", "Delete selection"));
     bool ok = meshSel.deleteSelection();
     if (!ok)
         doc->abortCommand();