An option to add fields into relevant groups without dragging them.

Summary Hi, Whenever we create groups in UI data model section, the groups are empty by default. Then we had to first create fields and then drag them into relevant groups. Or we can first create all fields and then make groups and put them into their relevant groups. Now this 1 by 1 is a hassle if the fields in the collection are too much. So to decrease this hassle and make it more easy for the users we can(I hope we can) implement this: _Solution for Case 1 (fields are already created and now we are creating groups):_ • While creating group field, in its advance search we enlist names of all the fields that are currently present in the collection. • Those enlisted names are checkboxes which user can click to add fields into the group. • Just like we have in permissions page, when we are adding custom permission for fields. _Solution for Case 2 (groups are already present use is now creating fields):_ • User can see the groups in the advance d…