Treat boxOrdinalGroup and flexOrder as unitless.

docs/tips/06-style-props-value-px.md

@@ -20,6 +20,7 @@ Sometimes you _do_ want to keep the CSS properties unitless. Here's a list of pr
 
 - `boxFlex`
 - `boxFlexGroup`
+- `boxOrdinalGroup`
 - `columnCount`
 - `fillOpacity`
 - `flex`
@@ -27,6 +28,7 @@ Sometimes you _do_ want to keep the CSS properties unitless. Here's a list of pr
 - `flexPositive`
 - `flexShrink`
 - `flexNegative`
+- `flexOrder`
 - `fontWeight`
 - `lineClamp`
 - `lineHeight`

src/browser/ui/dom/CSSProperty.js

@@ -17,12 +17,14 @@
 var isUnitlessNumber = {
   boxFlex: true,
   boxFlexGroup: true,
+  boxOrdinalGroup: true,
   columnCount: true,
   flex: true,
   flexGrow: true,
   flexPositive: true,
   flexShrink: true,
   flexNegative: true,
+  flexOrder: true,
   fontWeight: true,
   lineClamp: true,
   lineHeight: true,