Global view: use generic CSS class to open panel (#7868)

I found this todo and just did it. 😆 

Changes proposed in this pull request:

- use `open-class` instead of `.box a`


How to test the feature manually:

1. go to global view
2. click on a box title link: it will open the whole category in the panel
3. click on a feed name: it will open the feed articles in the panel
4. nothing will be different for the user as before

1 files changed, 1 insertions, 2 deletions

diff --git a/p/scripts/global_view.js b/p/scripts/global_view.js
index 9ee9397cd..ebd65765c 100644
--- a/p/scripts/global_view.js
+++ b/p/scripts/global_view.js
@@ -84,8 +84,7 @@ function init_close_panel() {
 }
 
 function init_global_view() {
-	// TODO: should be based on generic classes
-	document.querySelectorAll('.box a').forEach(function (a) {
+	document.querySelectorAll('.open-panel').forEach(function (a) {
 		a.onclick = function (ev) {
 			load_panel(a.href);
 			return false;