Update z2ui5_sql_cl_app_01.clas.abap (#8)

Author: feng1976

src/z2ui5_sql_cl_app_01.clas.abap

@@ -233,6 +233,7 @@ CLASS Z2UI5_SQL_CL_APP_01 IMPLEMENTATION.
     ASSIGN ms_draft-s_preview-tab->* TO <tab2>.
     IF sy-subrc = 0.
       client->_bind_clear( `MS_DRAFT-S_PREVIEW-TAB->*` ).
+      client->_bind_clear( `MT_COLUMN_CONFIG` ).                     "feng add for bug 
       CLEAR ms_draft-s_preview-tab.
     ENDIF.