Remove the `Don't Limit` option for max_rows value of the Query Editor

If we change the Max_Rows from number to Don't Limit or any other number option then after disconnecting from the Query Editor or logout from the Maxscale and then after login and connect to the query editor also its still in Don't Limit mode or any other number only, as expected after disconnect from the Query editor/ logout from the maxscale, it should automatically change the max_rows to default 10000 limit. When user session is closed/logout then automatically it should set the max_rows value to 10000 in the GUI.