Refactor components

Implement context mechanism to pass default attributes to descendant
components.

ui/components/container.js

@@ -1,24 +1,22 @@
 "use strict";
 
-import m from "mithril";
-import * as components from "../components";
+import { m } from "../components";
 import * as store from "../store";
 
-const component = {
-  view: vnode => {
-    if (vnode.attrs.filter) {
-      if (!store.evaluateExpression(vnode.attrs.filter, vnode.attrs.device))
-        return null;
+export default function component() {
+  return {
+    view: vnode => {
+      if (vnode.attrs.filter) {
+        if (!store.evaluateExpression(vnode.attrs.filter, vnode.attrs.device))
+          return null;
+      }
+
+      const children = Object.values(vnode.attrs.components).map(c => {
+        if (typeof c !== "object") return `${c}`;
+        return m(c.type, c);
+      });
+      if (vnode.attrs.element) return m(vnode.attrs.element, children);
+      else return children;
     }
-
-    const children = Object.values(vnode.attrs.components).map(c => {
-      if (typeof c !== "object") return `${c}`;
-      const attrs = Object.assign({}, vnode.attrs, c);
-      return m(components.get(attrs.type), attrs);
-    });
-    if (vnode.attrs.element) return m(vnode.attrs.element, children);
-    else return children;
-  }
-};
-
-export default component;
+  };
+}