Add column sorting to package table.

* css/guix.css: New file.
* guix-web/view.scm (main-layout): Include guix.css.
* js/guix-packages.js (guix.Sorter.prototype.reverse): New method.
  (guix.controller.sorter): Make property.
  (guix.controller.columns): New variable.
  (guix.controller.prototype.paginate): Use sorter property.
  (guix.controller.prototype.sortBy): New method.
  (guix.view): Render column sorting UI.

1 files changed, 11 insertions, 0 deletions

diff --git a/css/guix.css b/css/guix.css
new file mode 100644
index 0000000..038a9d0
--- /dev/null
+++ b/css/guix.css
@@ -0,0 +1,11 @@
+.sort-descend:after {
+    content: '▼'
+}
+
+.sort-ascend:after {
+    content: '▲'
+}
+
+.sorter {
+    cursor: pointer;
+}