Settings icons polished up and revised for Windows 10 Mobile
And you won't find device encryption in Settings any more. It is now found under Update & security. You can check out the different icons used in build 14332 and build 14342. Click on the slideshow and note the differences between the earlier build (with the white background) and the later build (in dark).
By improving the icons, Microsoft is still improving the look of Windows 10 Mobile.
source: Aperture via MSPoweruser