Display MediaSourceCount for all media Types

All items support alternate local versions, even if it's not documented. Tested with episode and musicVideo types. Added MSC to list items as well.

src/controllers/list.js

@@ -251,7 +251,7 @@ import { appRouter } from '../components/appRouter';
         if (params.type === 'nextup') {
             return apiClient.getNextUpEpisodes(modifyQueryWithFilters(instance, {
                 Limit: limit,
-                Fields: 'PrimaryImageAspectRatio,DateCreated,BasicSyncInfo',
+                Fields: 'PrimaryImageAspectRatio,DateCreated,BasicSyncInfo,MediaSourceCount',
                 UserId: apiClient.getCurrentUserId(),
                 ImageTypeLimit: 1,
                 EnableImageTypes: 'Primary,Backdrop,Thumb',
@@ -320,7 +320,7 @@ import { appRouter } from '../components/appRouter';
         return apiClient.getItems(apiClient.getCurrentUserId(), modifyQueryWithFilters(instance, {
             StartIndex: startIndex,
             Limit: limit,
-            Fields: 'PrimaryImageAspectRatio,SortName,Path,SongCount,ChildCount',
+            Fields: 'PrimaryImageAspectRatio,SortName,Path,SongCount,ChildCount,MediaSourceCount',
             ImageTypeLimit: 1,
             ParentId: item.Id,
             SortBy: sortBy