Merge pull request #1405 from alexhermida/feature/fix_us_backlog_filter

User story data filter by milestone

app/coffee/modules/backlog/main.coffee

@@ -365,7 +365,7 @@ class BacklogController extends mixOf(taiga.Controller, taiga.PageMixin, taiga.F
         @.initializeSubscription()
 
         return @.loadBacklog()
-            .then(=> @.generateFilters())
+            .then(=> @.generateFilters(milestone = "null"))
             .then(=> @scope.$emit("backlog:loaded"))
 
     prepareBulkUpdateData: (uses, field="backlog_order") ->

app/coffee/modules/controllerMixins.coffee

@@ -207,7 +207,7 @@ class UsFiltersMixin
             @filterRemoteStorageService.storeFilters(@scope.projectId, userFilters, @.storeCustomFiltersName).then(@.generateFilters)
             @.generateFilters()
 
-    generateFilters: ->
+    generateFilters: (milestone) ->
         @.storeFilters(@params.pslug, @location.search(), @.storeFiltersName)
 
         urlfilters = @location.search()
@@ -221,6 +221,9 @@ class UsFiltersMixin
         loadFilters.epic = urlfilters.epic
         loadFilters.q = urlfilters.q
 
+        if milestone
+            loadFilters.milestone = milestone
+
         return @q.all([
             @rs.userstories.filtersData(loadFilters),
             @filterRemoteStorageService.getFilters(@scope.projectId, @.storeCustomFiltersName)