Can't load new news and style issues on NC 13

[LEDfan]

• I have read the CONTRIBUTING.md and followed the provided tips

I have some issues with the news app, I'm reporting them in one issue, since I think they may be related.

Explain the Problem

Compact view style is broken

The problem is that you can scroll to the right until the end of the text of an article. (See the scrollbar)

Settings menu style is broken

Occurs when opening the settings menu and then hovering it.

Can't load older news items

For some reason it looks like the JS is not triggered to load newer news items, since there isn't a request in the network tab. Instead when I scroll to the bottom, there is just a white page.
The content is loaded using a mobile app however.

Steps to Reproduce

Explain what you did to encounter the issue

1. Open the news app...

System Information

• News app version: 12.0.0
• Nextcloud version: 13.0.0.9 (13.0 beta4)
• PHP version: 7.1..11
• Database and version: mysql Ver 15.1 Distrib 5.5.56-MariaDB, for Linux (x86_64) using readline 5.1
• Browser and version: Firefox nightly and Chrome 63.0.3239.132
• Distribution and version: openSUSE 42.3 (same problem on other machines)

Contents of nextcloud/data/nextcloud.log

{"reqId":"XyfK8Dgc4U39xviBLUlu","level":3,"time":"2018-01-06T07:40:30+00:00","remoteAddr":"","user":"--","app":"PHP","method":"--","url":"--","message":"file_get_contents(\/srv\\/www\/apps\/news\/appinfo\/signature.json): failed to open stream: No such file or directory at \/srv\/c.ledfan.be\/www\/lib\/private\/IntegrityCheck\/Helpers\/FileAccessHelper.php#40","userAgent":"--","version":"13.0.0.9"}

Contents of Browser Error Console

Content Security Policy: De instellingen van de pagina blokkeerden het laden van een bron op self (‘script-src 'nonce-xxxxx=' 'unsafe-eval'’). Source: (function (ERROR) {   const V8_STACK_....
JQMIGRATE: Migrate is installed, version 1.4.0
core.js:7:542

(I'm getting these messages on every page)

Network tab

There are some weird requests in the network tab:

The 302's are redirected to /apps/files.

[BernhardPosselt]

Dup of #239

Try to remove position: relative from #app-content-wrapper via your dev tools and see o if that also fixed compact mode

[LEDfan]

Removing position: relative fixes the loading of news item, but doesn't fix the styling, but removing display:flex fixes the style issues.

[BernhardPosselt]

Can you report that as well in the server issue?