Ran into the same issue, no answer found yet though.

Created a new js file in app_plugins to include the obsolete, but working, umb-header:

/**
* @ngdoc directive
* @name umbraco.directives.directive:umbHeaderOld
* @restrict E
* @function
* @description
* The header on an editor that contains tabs using bootstrap tabs - THIS IS OBSOLETE, use umbTabHeader instead
**/
angular.module("umbraco.directives")
    .directive('umbHeaderOld', function ($parse, $timeout) {
        return {
            restrict: 'E',
            replace: true,
            transclude: 'true',
            templateUrl: 'views/directives/umb-header.html',
            //create a new isolated scope assigning a tabs property from the attribute 'tabs'
            //which is bound to the parent scope property passed in
            scope: {
                tabs: "=",
                mLoaded: "="
            },
            link: function (scope, iElement, iAttrs) {

                scope.showTabs = iAttrs.tabs ? true : false;
                scope.visibleTabs = [];


                var membershiploadedWatch = scope.$watch("mLoaded", function (newV, oldV) {

                });
                //since tabs are loaded async, we need to put a watch on them to determine
                // when they are loaded, then we can close the watch
                var tabWatch = scope.$watch("tabs", function (newValue, oldValue) {

                    setTimeout(function () {
                        angular.forEach(newValue, function (val, index) {

                            var tab = { id: val.id, label: val.label, visible: val.visible };

                            if (typeof val.visible !== 'undefined') {
                                if (val.visible) {
                                    scope.visibleTabs.push(tab);
                                }
                            } else {
                                scope.visibleTabs.push(tab);
                            }
                        });



                        //don't process if we cannot or have already done so
                        if (!newValue) { return; }
                        if (!newValue.length || newValue.length === 0) { return; }

                        //we need to do a timeout here so that the current sync operation can complete
                        // and update the UI, then this will fire and the UI elements will be available.
                        $timeout(function () {
                            tabWatch();

                            $timeout(function () {
                                iElement.find(".nav-tabs .visibleTabs a:first").tab('show');

                                //enable the tab drop
                                iElement.find('.nav-pills, .nav-tabs').tabdrop();

                                //ensure to destroy tabdrop (unbinds window resize listeners)
                                scope.$on('$destroy', function () {
                                    iElement.find('.nav-pills, .nav-tabs').tabdrop("destroy");
                                });

                            }, 0);
                            //stop watching now
                        }, 200);


                    }, 500);

                });
            }
        };
    });

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