Click and drag in slide details causes UI issues

[LunaUrsa]

Steps to reproduce

1. Create new board.
2. Create new deck.
3. Create new slide.
4. Enter text into slide.
5. Click on text and drag to the right.
6. Observe how the right hand window appears.

Expected behaviour

Nothing should happen.

Actual behaviour

The right hand window pane appears.

Server configuration

Operating system: Linux farnsworth 4.4.0-77-generic #98-Ubuntu SMP Wed Apr 26 08:34:02 UTC 2017 x86_64

Web server: nginx/1.10.0 (fpm-fcgi)

Database: mysql 10.0.29

PHP version: 7.0.15-0ubuntu0.16.04.4
Modules loaded: Core, date, libxml, openssl, pcre, zlib, filter, hash, Reflection, SPL, session, standard, cgi-fcgi, mysqlnd, PDO, xml, apcu, calendar, ctype, curl, dom, mbstring, fileinfo, ftp, gd, gettext, iconv, igbinary, json, exif, mysqli, pdo_mysql, Phar, posix, readline, redis, shmop, SimpleXML, sockets, sysvmsg, sysvsem, sysvshm, tokenizer, wddx, xmlreader, xmlwriter, xsl, zip, Zend OPcache

Nextcloud version: 11.0.3 (stable) - 11.0.3.2

Updated from an older Nextcloud/ownCloud or fresh install:

Where did you install Nextcloud from:

Signing status:

Signing status

[]

"No errors have been found."

List of activated apps:

App list

``` Enabled: - activity: 2.4.1 - activitylog: 0.0.1 - admin_notifications: 1.0.0 - announcementcenter: 3.0.0 - apporder: 0.3.3 - bookmarks: 0.10.0 - calendar: 1.5.3 - comments: 1.1.0 - contacts: 1.5.3 - dav: 1.1.1 - deck: 0.2.1 - defaultgroup: 0.3.0 - direct_menu: 0.10.2 - drawio: 0.8.8 - external: 1 - federatedfilesharing: 1.1.1 - federation: 1.1.1 - files: 1.6.1 - files_automatedtagging: 1.1.1 - files_markdown: 1.0.1 - files_pdfviewer: 1.0.1 - files_reader: 1.0.4 - files_sharing: 1.1.1 - files_texteditor: 2.2 - files_trashbin: 1.1.0 - files_versions: 1.4.0 - files_videoplayer: 1.0.0 - firstrunwizard: 2.0 - gallery: 16.0.0 - issuetemplate: 0.2.1 - logreader: 2.0.0 - lookup_server_connector: 1.0.0 - nextant: 1.0.8 - nextcloud_announcements: 1.0 - notes: 2.3.1 - notifications: 1.0.1 - ocsms: 1.12.0 - ojsxc: 3.2.1 - ownpad: 0.5.10 - passman: 2.1.2 - password_policy: 1.1.0 - previewgenerator: 1.0.6 - provisioning_api: 1.1.0 - rainloop: 5.0.0 - registration: 0.2.5 - richdocuments: 1.11.33 - serverinfo: 1.1.1 - sharebymail: 1.0.1 - survey_client: 0.1.5 - systemtags: 1.1.3 - templateeditor: 0.2 - theming: 1.1.1 - twofactor_backupcodes: 1.0.0 - updatenotification: 1.1.1 - workflowengine: 1.1.1

Disabled:

• admin_audit
• audioplayer
• encryption
• files_accesscontrol
• files_external
• files_retention
• githubmergetracker
• keeweb
• mail
• news
• piwik
• spreed
• spreedme
• tasks
• user_external
• user_ldap
• user_saml
• weather
• workin2gether

</details>

**The content of config/config.php:**
<details>
	<summary>Config report</summary>

{
"instanceid": "oceghwuwwlam",
"passwordsalt": "REMOVED SENSITIVE VALUE",
"secret": "REMOVED SENSITIVE VALUE",
"trusted_domains": [
"cloud.tripsit.me"
],
"datadirectory": "/usr/share/nginx/nextcloud-data",
"overwrite.cli.url": "https://cloud.tripsit.me",
"dbtype": "mysql",
"version": "11.0.3.2",
"dbname": "nextcloud",
"dbhost": "localhost",
"dbport": "",
"dbtableprefix": "oc_",
"dbuser": "REMOVED SENSITIVE VALUE",
"dbpassword": "REMOVED SENSITIVE VALUE",
"logtimezone": "UTC",
"installed": true,
"mail_smtpmode": "smtp",
"mail_domain": "tripsit.me",
"memcache.local": "\OC\Memcache\Redis",
"memcache.locking": "\OC\Memcache\Redis",
"redis": {
"host": "localhost",
"port": 6379
},
"mail_from_address": "cloud",
"mail_smtpport": "465",
"mail_smtpauthtype": "LOGIN",
"mail_smtpauth": 1,
"mail_smtpname": "REMOVED SENSITIVE VALUE",
"mail_smtppassword": "REMOVED SENSITIVE VALUE",
"mail_smtphost": "mail.tripsit.me",
"mail_smtptimeout": 30,
"maintenance": false,
"mail_smtpsecure": "ssl"
}

</details>

**Are you using external storage, if yes which one:** files_external is disabled

**Are you using encryption:** no

**Are you using an external user-backend, if yes which one:** LDAP/ActiveDirectory/Webdav/...

### Client configuration
**Browser:** Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36

**Operating system:**

Windows 7

===I can provide logs if needed ===

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[artemanufrij]

confirm

[juliusknorr]

related to #262

[juliusknorr]

Already fixed by
ec5389b