Stable Build 51.4.66

I  heard about changelogs, but still no changelog here ...

• Fixed a mistakes in string pluralization of error warnings :wink:
• Fixed icons that were rendered incorrectly on Mac OS X 10.13 High Sierra
• Selective sync warning dialog UI improvements

I'm also interested in the significant changes not visible to the user!

I think this build broke my device's Wifi.

Developers, please check this post in the Business support area:

https://www.dropboxforum.com/t5/Business-Admins-support/Stable-Build-51-4-66-breaks-WiFi-on-Windows-10/td-p/279731

The last two builds initiate discrete graphics on several of my MacBook Pros (from 2010 to 2017).  I won't be able to use DB until this is resolved.