Wrong group list display

[Loki3000]

Steps to reproduce

1. Create several groups

Expected behaviour

Expected looks like that:

Actual behaviour

Server configuration detail

Operating system: Linux 4.4.0-112-generic #135-Ubuntu SMP Fri Jan 19 11:48:14 UTC 2018 i686

Webserver: nginx/1.12.2 (fpm-fcgi)

Database: mysql 5.7.21

PHP version: 7.2.2-1+ubuntu16.04.1+deb.sury.org+1
Modules loaded: Core, date, libxml, openssl, pcre, zlib, filter, hash, Reflection, SPL, sodium, session, standard, cgi-fcgi, mysqlnd, PDO, xml, apcu, apc, calendar, ctype, curl, dom, mbstring, fileinfo, ftp, gd, gettext, iconv, igbinary, json, exif, msgpack, mysqli, pdo_mysql, Phar, posix, readline, shmop, SimpleXML, sockets, sysvmsg, sysvsem, sysvshm, tokenizer, wddx, xmlreader, xmlwriter, xsl, zip, memcached, Zend OPcache

Nextcloud version: 13.0.0 - 13.0.0.14

Updated from an older Nextcloud/ownCloud or fresh install:
updated frim 13RC

List of activated apps

Enabled:
 - activity: 2.6.1
 - apporder: 0.4.1
 - bruteforcesettings: 1.0.3
 - calendar: 1.6.0
 - contacts: 2.0.1
 - dav: 1.4.6
 - federatedfilesharing: 1.3.1
 - files: 1.8.0
 - files_external: 1.4.1
 - files_pdfviewer: 1.2.0
 - files_sharing: 1.5.0
 - files_texteditor: 2.5.1
 - files_trashbin: 1.3.0
 - files_versions: 1.6.0
 - files_videoplayer: 1.2.0
 - firstrunwizard: 2.2.1
 - gallery: 18.0.0
 - issuetemplate: 0.3.0
 - logreader: 2.0.0
 - lookup_server_connector: 1.1.0
 - news: 12.0.1
 - nextcloud_announcements: 1.2.0
 - notes: 2.3.2
 - notifications: 2.1.2
 - oauth2: 1.1.0
 - ocdownloader: 1.5.5
 - password_policy: 1.3.0
 - previewgenerator: 1.0.9
 - provisioning_api: 1.3.0
 - rainloop: 5.0.6
 - serverinfo: 1.3.0
 - sharebymail: 1.3.0
 - survey_client: 1.1.0
 - tasks: 0.9.5
 - theming: 1.4.1
 - twofactor_backupcodes: 1.2.3
 - twofactor_totp: 1.4.1
 - updatenotification: 1.3.0
 - workflowengine: 1.3.0
Disabled:
 - admin_audit
 - circles
 - comments
 - encryption
 - federation
 - systemtags
 - user_external
 - user_ldap

Configuration (config/config.php)

{
    "instanceid": "***REMOVED SENSITIVE VALUE***",
    "passwordsalt": "***REMOVED SENSITIVE VALUE***",
    "secret": "***REMOVED SENSITIVE VALUE***",
    "trusted_domains": [
        "***REMOVED SENSITIVE VALUE***"
    ],
    "datadirectory": "***REMOVED SENSITIVE VALUE***",
    "overwrite.cli.url": "***REMOVED SENSITIVE VALUE***",
    "logfile": "\/var\/log\/nextcloud.log",
    "dbtype": "mysql",
    "version": "13.0.0.14",
    "dbname": "***REMOVED SENSITIVE VALUE***",
    "dbhost": "***REMOVED SENSITIVE VALUE***",
    "dbtableprefix": "oc_",
    "dbuser": "***REMOVED SENSITIVE VALUE***",
    "dbpassword": "***REMOVED SENSITIVE VALUE***",
    "installed": true,
    "loglevel": 2,
    "theme": "",
    "maintenance": false,
    "mail_from_address": "***REMOVED SENSITIVE VALUE***",
    "mail_smtpmode": "php",
    "mail_domain": "***REMOVED SENSITIVE VALUE***",
    "forcessl": true,
    "trashbin_retention_obligation": "auto",
    "appstore.experimental.enabled": true,
    "defaultapp": "rainloop",
    "filesystem_check_changes": 0,
    "asset-pipeline.enabled": true,
    "updatechecker": true,
    "logtimezone": "UTC",
    "log_query": false,
    "htaccess.RewriteBase": "\/",
    "integrity.check.disabled": false,
    "enable_previews": true,
    "preview_max_scale_factor": 1,
    "enabledPreviewProviders": {
        "0": "OC\\Preview\\PNG",
        "1": "OC\\Preview\\JPEG",
        "2": "OC\\Preview\\GIF",
        "11": "OC\\Preview\\Illustrator",
        "12": "OC\\Preview\\Postscript",
        "13": "OC\\Preview\\Photoshop",
        "14": "OC\\Preview\\TIFF"
    },
    "updater.release.channel": "stable",
    "mysql.utf8mb4": true,
    "memcache.local": "\\OC\\Memcache\\APCu",
    "memcache.distributed": "\\OC\\Memcache\\Memcached",
    "memcached_servers": [
        [
            "localhost",
            11211
        ]
    ],
    "updater.secret": "***REMOVED SENSITIVE VALUE***"
}

Are you using encryption: no

Client configuration

Browser: Mozilla/5.0 (Windows NT 6.1; rv:58.0) Gecko/20100101 Firefox/58.0

Operating system:
Windows 7, Linux Mint 18

[private-nc-user]

Maybe the same as in #453
I have the same behaviour. In Chrome it looks good, in Firefox it seems there is a line break?

[Loki3000]

Yes, it's same. As I see, the problem is in this code:

#app-navigation > ul > li > a {
    white-space: nowrap;
}

but I'm not sure that it's could be harmless deleted.