revert: "fix: fix up media folder and user selectors"

This commit partially reverts commit 0d765de.

The updated sync media folder logic was flawed, and fixing it will produce spaghetti so instead I'll revert the changes and trust the users to not make mistakes. 📿

Shokofin/Configuration/configController.js

@@ -614,15 +614,9 @@ async function syncMediaFolderSettings(form) {
     config.VFS_LiveInCache = form.querySelector("#VFS_LiveInCache").checked;
     config.VFS_AttachRoot = form.querySelector("#VFS_AttachRoot").checked;
     if (mediaFolderConfig) {
-        // We need to update the config for all libraries that use this media folder, because
-        // otherwise we will experience edge cases where the media folder is used in multiple
-        // libraries potentially with and without the VFS enabled.
-        const libraryIDs = config.MediaFolders.filter(m => m.MediaFolderId === mediaFolderId).map(m => m.LibraryId);
-        for (const libraryId of libraryIDs) {
-            for (const c of config.MediaFolders.filter(m => m.LibraryId === libraryId)) {
-                c.IsVirtualFileSystemEnabled = form.querySelector("#MediaFolderVirtualFileSystem").checked;
-                c.LibraryFilteringMode = form.querySelector("#MediaFolderLibraryFilteringMode").value;
-            }
+        for (const c of config.MediaFolders.filter(m => m.LibraryId === libraryId)) {
+            c.IsVirtualFileSystemEnabled = form.querySelector("#MediaFolderVirtualFileSystem").checked;
+            c.LibraryFilteringMode = form.querySelector("#MediaFolderLibraryFilteringMode").value;
         }
     }
     else {