Hide/Show all sub elements with one click on Tree View

Working with all the elements with “Element visible on page load” set to OFF (appropriated for some kind of native apps dev) it becomes annoying to open a group full of elements and do not see neither one of them. You have to go on top of each on and click on it to visualize it and if you refresh the page you’ve to do it again and again.

Would be amazing to have an “hide/show all” functionality. Maybe an “alt + click” con the parent element in the tree?