Improve readability of wide content

# Issue details

### Duplicate?
Have you searched the issues of this repository if your issue is already known? yes

### Actual behaviour
Look at content that is wider than the screen, e.g.:
- a wide `

`(?) like 

- tables from wikipedia like at 


Such content is not squeezed to fit into the screen width, instead one can scroll horizontally to see all of it.

However, the scrolling is difficult because swiping to much to the left goes to the next article.

### Expected behaviour

Either squeeze the content (which might look bad) or [offer to] disable going the the next article by swiping. Maybe there's some other solution, too.

# Environment details

- **wallabag app version**: 1.0.2 (106)

- **wallabag app installation source**: f-droid

- **Android OS version**: 7.1

- **Android ROM** (e.g. stock, LineageOS, SlimRom,…): custom, LineageOS 

- **Android hardware**: golden / Galaxy S3mini

- **wallabag server version**: 2.3.1

# Your experience with wallabag Android app

Have you had any luck using wallabag Android app before?

Yes, works great, thank you!