Issue 1950 - Fixed: Filter tooltip not shown for long filters

chrome/content/ui/sidebar.js

Index: chrome/content/ui/sidebar.js
===================================================================
--- a/chrome/content/ui/sidebar.js
+++ b/chrome/content/ui/sidebar.js
@@ -249,10 +249,17 @@
     while (box.firstChild)
       box.removeChild(box.firstChild);
 
-  for (var i = 0; i < text.length; i += 80)
+  let lines = text.match(/.{1,80}/g);
+  if (lines.length > 7)
   {
-    var description = document.createElement("description");
-    description.setAttribute("value", text.substr(i, 80));
+    // Text is too long to display in full so we cut out the middle part
+    lines = lines.slice(0,3).concat("\u2026", lines.slice(-3));
+  }
+
+  for (let line of lines)
+  {
+    let description = document.createElement("description");
+    description.setAttribute("value", line);
     box.appendChild(description);
   }
 }