Some icons are not translated properly

## Introduction
We just tried to get your recent amendments from #3, #13 and #14 on board but obviously this wouldn't help as the Grunt task has not been run. No hurries on that one, we are already very happy with the current state and will just continue reporting things we come across - even minor ones you might have recognized already - and hope you are okay with that.

## Preface
We just ran a full Discourse rebuild from the command line and recognized a subtle regression barely able to spot between the version running before, which was installed a few days ago and the current version `v2.2.0.beta8 +37`.

## Problem
The `fa-eye` icon designated to signal the state of a topic item being listed or unlisted in the topic list on the right hand side just disappeared.

### With Default theme

### With Material theme