Angular table upgrades

I'm using this for my table [login to view URL] Need someone to do the following for the headers. 1) Add a button below it named and id 0 below the text. 2) On click, open a bootstrap modal that has buttons to set the header mapping. On clicking the modal closes and a new button is assigned to the header. If there is a previous button, need a revert to previous. 3) Store the whole list of header buttons in the order they appear. 4) Global setting to make the table uneditable