Remove cfg_id

[crossan007]

@DawoudIO do you think there is still value in keeping a cfg_id after the changes in #1817 the only place the cfg_id is used is on the actual config page - nowhere elase

George Dawoud @DawoudIO 21:02 Nope you can remove it

Charles @crossan007 21:07 just access all settings by name that'll make our dev easier since we don't have to track / allocate the numbers