feat(client): support negative margin

apps/client/src/styles/bootstrap.scss

@@ -37,10 +37,13 @@ $utilities: map.merge(
       property: margin-right,
       class: mr,
       values: map.merge(
+          map.merge(
             $spacers,
             (
               auto: auto
             )
+          ),
+          negativify-map($spacers)
         )
     ),
     'margin-left-compat': (
@@ -48,10 +51,13 @@ $utilities: map.merge(
       property: margin-left,
       class: ml,
       values: map.merge(
+          map.merge(
             $spacers,
             (
               auto: auto
             )
+          ),
+          negativify-map($spacers)
         )
     ),
     'padding-right-compat': (