ui-shared: add homepage to tabs

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
diff --git a/cgit.css b/cgit.css
index 82c755c..50f6587 100644
--- a/cgit.css
+++ b/cgit.css
@@ -85,6 +85,11 @@
 	background-color: #ccc;
 }
 
+div#cgit table.tabs a[href^="http://"]:after, div#cgit table.tabs a[href^="https://"]:after {
+	content: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAAKCAQAAAAnOwc2AAAAAnNCSVQICFXsRgQAAAAJcEhZcwAAABQAAAAUAVyMgXwAAAAZdEVYdFNvZnR3YXJlAHd3dy5pbmtzY2FwZS5vcmeb7jwaAAAAeklEQVQI12NoYCu3q3ABwXL98vTy/0D4jaF8XXldRRoYejAwlu8BCTOU72SAg4q08j/le0GC22BC5anlfyrSGBiBGCZYllz+pywLJg8WLOMtf1GeCjRgI5IgSBhMboUIHq40r1CCQrfyDRAV6uXdZTMhsKKlVIIBFwAAVeg4KFYK95cAAAAASUVORK5CYII=);
+	margin: 0 0 0 5px;
+}
+
 div#cgit table.tabs td.form {
 	text-align: right;
 }