Update CHANGELOG and docs

CHANGELOG.md

@@ -21,6 +21,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - NodeInfo: `pleroma_emoji_reactions` to the `features` list.
 - Configuration: `:restrict_unauthenticated` setting, restrict access for unauthenticated users to timelines (public and federate), user profiles and statuses.
 - Configuration: Add `:database_config_whitelist` setting to whitelist settings which can be configured from AdminFE.
+- Configuration: `filename_display_max_length` option to set filename truncate limit, if filename display enabled (0 = no limit).
 - New HTTP adapter [gun](https://github.com/ninenines/gun). Gun adapter requires minimum OTP version of 22.2 otherwise Pleroma won’t start. For hackney OTP update is not required.
 - Mix task to create trusted OAuth App.
 - Notifications: Added `follow_request` notification type.

config/description.exs

@@ -119,6 +119,11 @@
             ]
           }
         ]
+      },
+      %{
+        key: :filename_display_max_length,
+        type: :integer,
+        description: "Set max length of a filename to display. 0 = no limit. Default: 30"
       }
     ]
   },

docs/configuration/cheatsheet.md

@@ -498,6 +498,7 @@ the source code is here: https://github.com/koto-bank/kocaptcha. The default end
 * `base_url`: The base URL to access a user-uploaded file. Useful when you want to proxy the media files via another host.
 * `proxy_remote`: If you're using a remote uploader, Pleroma will proxy media requests instead of redirecting to it.
 * `proxy_opts`: Proxy options, see `Pleroma.ReverseProxy` documentation.
+* `filename_display_max_length`: Set max length of a filename to display. 0 = no limit. Default: 30.
 
 !!! warning
     `strip_exif` has been replaced by `Pleroma.Upload.Filter.Mogrify`.