reduce repetition in custom header templates about ng-table

[esvit]

Why you can't use something like this?

%script(type="text/ng-template" id="table/header.html")
    %tr
        %th.header(ng-repeat="(i, column) in columns" ng-class="{sortable: column.sortable,'sort-asc': params.sorting[column.sortable]=='asc', 'sort-desc': params.sorting[column.sortable]=='desc'}" ng-click='sortBy(column)' ng-show='column.show(this)')
            %i(ng-class="'my-icon' + i")

[rweng]

Because I got some entries with text, some with icons. Additionally, the icons have sometimes additional classes.

[esvit]

I implement custom header, I think it resolved this issue, look this example https://github.com/esvit/ng-table/blob/master/examples/demo18.html