way to report erroneous article fetching

# Issue details

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

### Actual behaviour
Cannot find button to report bad fetching via email like in web

### Expected behaviour
Such a button should exist

# Steps to reproduce the issue
NA

# Environment details
- **wallabag app version**: 2.2.0
- **wallabag app installation source** (e.g. Gplay, F-Droid, manual): FDroid
- **Android OS version**: 8
- **Android ROM** (e.g. stock, LineageOS, SlimRom,…): stock
- **Android hardware**: moto z2 play
- **wallabag server version**: 2.3.7
- **Do you have Two-Factor-Authentication enabled?**: No

# Your experience with wallabag Android app
Have you had any luck using wallabag Android app before? (Sometimes we get tired of reading bug reports all day and a lil' positive end note does wonders)

Love it!

Start by locating the Android app's article-fetching error handling and the UI used for article actions, then compare the existing web reporting flow mentioned in the issue. Done means users can find a way to report an erroneously fetched article by email, with the behavior verified on the stated Android and wallabag versions.

Written by the indexing model from the issue text.