New editor panel navigation

pages/support/support.scarlet

@@ -1,13 +1,11 @@
-.feature-cards,
-.payment-cards
+mixin feature-cards
 	horizontal-wrap
 	justify-content center
 	width 100%
 	max-width 1200px
 	margin content-padding auto
 
-.feature-card,
-.payment-card
+mixin feature-card
 	vertical
 	flex-basis 240px
 	border-radius 5px
@@ -22,6 +20,14 @@
 		box-shadow shadow-medium
 		text-shadow none
 
+.feature-cards,
+.payment-cards
+	feature-cards
+
+.feature-card,
+.payment-card
+	feature-card
+
 .payment-card
 	:hover
 		cursor pointer