Don't use unicode emoji in help text

defaultwelcome/help_inbox_en.md

@@ -1,20 +1,20 @@
 ### Middle column
 Incoming posts will appear here, as a chronological timeline. If you send any posts they will also appear here.
 
-### 🡱 The top banner 🡱
+### The top banner
 At the top of the screen you can select the **banner** to switch to your profile, and edit it or log out.
 
-### 🡱 Timeline buttons and icons 🡱
+### Timeline buttons and icons
 The **buttons** below the top banner allow you to select different timelines. There are also **icons** on the right to **search**, view your **calendar** or create **new posts**.
 
 The **show/hide** icon allows more timeline buttons to be shown, along with moderator controls.
 
-### 🡰 Left column 🡰
+### <- Left column
 Here you can add **useful links**. This only appears on desktop displays or devices with larger screens. It is similar to a *blogroll*. You can only add or edit links if you have an **administrator** or **editor** role.
 
 If you are on mobile then user the **links icon** at the top to read news.
 
-### 🡲 Right column 🡲
+### Right column ->
 RSS feeds can be added in the right column, known as the *newswire*. This only appears on desktop displays or devices with larger screens. You can only add or edit feeds if you have an **administrator** or **editor** role, and incoming feed items can also be moderated.
 
 If you are on mobile then user the **newswire icon** at the top to read news.