[SHELL32] Modify context menu to include Align To Grid, and remove Line Up Icons

Implement support for using Align To Grid, which itself simply sets the LVS_EX_SNAPTOGRID extended style of the list view control

dll/win32/shell32/CDefViewBckgrndMenu.cpp

@@ -263,6 +263,7 @@ CDefViewBckgrndMenu::InvokeCommand(LPCMINVOKECOMMANDINFO lpcmi)
     case FCIDM_SHVIEW_AUTOARRANGE:
     case FCIDM_SHVIEW_SNAPTOGRID:
     case FCIDM_SHVIEW_REFRESH:
+    case FCIDM_SHVIEW_ALIGNTOGRID:
         if (!m_site)
             return E_FAIL;