Sort Custom Filters

Closes #6334

frontend/src/Components/Filter/CustomFilters/CustomFiltersModalContent.js

@@ -30,7 +30,9 @@ function CustomFiltersModalContent(props) {
 
       <ModalBody>
         {
-          customFilters.map((customFilter) => {
+          customFilters
+            .sort((a, b) => a.label.localeCompare(b.label))
+            .map((customFilter) => {
               return (
                 <CustomFilter
                   key={customFilter.id}

frontend/src/Components/Menu/FilterMenuContent.js

@@ -40,7 +40,15 @@ class FilterMenuContent extends Component {
         }
 
         {
-          customFilters.map((filter) => {
+          customFilters.length > 0 ?
+            <MenuItemSeparator /> :
+            null
+        }
+
+        {
+          customFilters
+            .sort((a, b) => a.label.localeCompare(b.label))
+            .map((filter) => {
               return (
                 <FilterMenuItem
                   key={filter.id}