Guests whitelist revision

[Antreesy]

Ref source:

guests/lib/AppWhitelist.php

Lines 52 to 54 in 053c96a

	public const WHITELIST_ALWAYS = ',core,theming,settings,avatar,files,heartbeat,dav,guests,impersonate,accessibility,terms_of_service';
	public const DEFAULT_WHITELIST = 'files_trashbin,files_versions,files_sharing,files_texteditor,text,activity,firstrunwizard,photos,notifications,dashboard,user_status,weather_status';

WHITELIST_ALWAYS and DEFAULT_WHITELIST could be updated to include some more of the apps shipped (and enabled by default) with Nextcloud core, to avoid confusion like "Guest account can't preview PDF files", as files_pdfviewer is not included in the default list.

https://github.com/nextcloud/server/blob/356f3ded52cf48a26295daef96c032d6d087a518/core/shipped.json#L56

[sebastiaanveld]

Guess this is related to #380 and #149