FEATURE: show timeline component when expanding post progress

- Show fullscreen timeline with title of topic in mobile
- Go to post # kb shortcut now unconditionally uses a modal
- Always show wrench on topics (was missing if progress bar was showing)
- Be smarter about rendering timeline even if composer is open (provided there is room)

vendor/assets/javascripts/div_resizer.js

@@ -67,6 +67,7 @@ endDrag = function(e, opts) {
   if (typeof opts.resize === "function") {
     opts.resize();
   }
+  $(div).trigger("div-resized");
   div = null;
 };