Skin reverts when going from settings to any other page

[RandomAnimeGamer]

Using nodeBB 2.1.0 and Slick 2.0.1

Step 1 - Navigate to the Account -> Settings page
Step 2 - Select the skin "Dark" and save (Dark skin will appear)
Step 3 - Navigate to any other screen or page

Expected Result: The dark skin will be retained on other pages
Actual Result: The dark skin reverts to a light skin permanently

[RandomAnimeGamer]

Regression of #20