Thank you, @Kabirdas!
This seems like a feasible solution once certain pages are getting too big. Unfortunately, unnecessary hidden DOM still slows the app down.
We generally face performance issues with our app. Page load is quite slow on normal computers. On a terminal server it's barely usable since opening up a new page takes an eternity.
Any other suggestions are highly appreciated and I'll keep you updated, once I have more time to work on this.