Enable search for not-logged users in shared folders

Steps to reproduce

1. Share folder with files via the link
2. While not logged, as a user - open the link (or in Incognito mode)

Expected behaviour

I expect, that search bar will be available, so I can search for files

Actual behaviour

There is no search bar. It only shown for authenticated users.

Server configuration

Operating system:
Ubuntu 16.04

Web server:
Apache 2.4.7

Database:
MySQL

PHP version:
7.0

Nextcloud version: (see Nextcloud admin page)
10.0.1

Updated from an older Nextcloud/ownCloud or fresh install:
Fresh install

Where did you install Nextcloud from:
From the https://download.nextcloud.com/server/releases/nextcloud-10.0.1.zip

Signing status:

http://backup.slavikf.com/index.php/settings/integrity/failed
No errors have been found.

List of activated apps:
Default set of apps for clean install

Are you using external storage, if yes which one: local/smb/sftp/...
Only local

Are you using encryption: yes/no
No

Are you using an external user-backend, if yes which one: LDAP/ActiveDirectory/Webdav/...
No

Client configuration

Browser:
Chrome 53

Operating system:
Windows 10

Start by reproducing the issue from a shared-folder link while signed out or using Incognito mode, then inspect the shared-folder page and its search-bar behavior. Done means unauthenticated users can see and use search in shared folders without changing authenticated-user behavior.