[Tabs View] Improve Lazy Load logic

[deeptailor]

At the moment, when using the lazy load option, we destroy the tabs when the user clicks away from the current tab.

We should keep already loaded tabs active but use visibility hidden to hide it from users view, this will greatly improve load times, and allows users to switch back and forth like tabs view was designed to.

Testing Notes

1. Create a dense layout with multiple plots and tables
2. Create a stacked plot with 3 to 4 plots.
3. Create a tabs view and set the eager load option to false.
4. Add the 2 views created earlier into the tabs view.
5. Refresh the page.
6. Click on the other tab, notice that the new tab will load when you click on it.
7. Click on the first tab, notice that the first tab will already be loaded when you click on it.