Added Ui.Row component.

source/Row.mint

@@ -0,0 +1,31 @@
+/* A row of items which are separated by a gap (uses Ui.Container). */
+component Ui.Row {
+  /* The size of the component. */
+  property size : Ui.Size = Ui.Size::Inherit
+
+  /* The gap between the items. */
+  property gap : Ui.Size = Ui.Size::Em(0.5)
+
+  /* The items to render. */
+  property children : Array(Html) = []
+
+  /* Where to justify the items. */
+  property justify : String = "stretch"
+
+  /* Where to align the items. */
+  property align : String = "stretch"
+
+  /* Renders the component. */
+  fun render : Html {
+    <Ui.Container
+      orientation="horizontal"
+      justify={justify}
+      align={align}
+      size={size}
+      gap={gap}>
+
+      <{ children }>
+
+    </Ui.Container>
+  }
+}