Fix linting error

src/app/ui/TreeView.js

@@ -99,7 +99,7 @@ class TreeView {
         if (self.isExpanded(keyPath)) {
           if (!self.expandPath.includes(keyPath)) self.expandPath.push(keyPath)
         } else {
-          self.expandPath = self.expandPath.filter(path => path != keyPath)
+          self.expandPath = self.expandPath.filter(path => path !== keyPath)
         }
       }
       label.oncontextmenu = function (event) {