Always have 3 sort elements in sort selection modal.

app/assets/javascripts/angular/controllers/dialogs/sorting.js

@@ -52,6 +52,10 @@ angular.module('openproject.workPackages.controllers')
       return [$scope.availableColumnsData.filter(function(column) { return column.id == element.field; })[0],
               $scope.availableDirectionsData.filter(function(direction) { return direction.id == element.direction; })[0]]
     });
+
+    while($scope.sortElements.length < 3) {
+      $scope.sortElements.push([]);
+    }
   }
 
   $scope.getAvailableColumnsData = function(term, result) {
@@ -63,7 +67,11 @@ angular.module('openproject.workPackages.controllers')
   }
 
   $scope.updateSortation = function(){
-    var sortElements = $scope.sortElements.map(function(element){
+    var sortElements = $scope.sortElements
+      .filter(function(element){
+        return element.length == 2;
+      })
+      .map(function(element){
         return { field: element[0].id, direction: element[1].id }
       })
     QueryService.updateSortElements(sortElements);

app/assets/javascripts/angular/services/query-service.js

@@ -134,7 +134,6 @@ angular.module('openproject.services')
       return QueryService.doGet(url, function(response){
         availableColumns = response.data.available_columns;
         return availableColumns;
-<<<<<<< HEAD
       });
     },
 
@@ -147,9 +146,6 @@ angular.module('openproject.services')
 
       this.hideColumns(currentColumns.map(function(column) { return column.name; }));
       this.showColumns(selectedColumnNames);
-=======
-      })
->>>>>>> Temp solution - moved sortation watcher to wp controller.
     },
 
     updateSortElements: function(sortation) {