Add a Chevron component (#515)

Also, add a ShowHide component, which consists of a label associated with a chevron
10 jobs for master in 6 minutes and 46 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test Build Static
passed #503935
Test_N_Build

00:05:05

passed #503936
Test_N_Build:internal

00:05:05

 
  Build Docker Images
passed #503939
Nginx:Internal

00:00:35

passed #503937
Nginx:Live

00:01:05

passed #503940
Node:Internal

00:01:08

passed #503938
Node:Live

00:01:33

 
  Deploy
passed #503944
Internal:HL

00:00:07

passed #503943
Internal:HX

00:00:08

passed #503942
Live:HL

00:00:06

passed #503941
Live:HX

00:00:06