TermIt

Empty screen without "loading screen animation" is shown if the user displays file content that was previously opened.

Way to replicate the issue:
- Go to vocabulary of MPP-3.5 (https://kbss.felk.cvut.cz/termit-dev/#/vocabularies/mpp-3.5-np/terms?namespace=http://onto.fel.cvut.cz/ontologies/slovn%C3%ADk/datov%C3%BD/)
- CTRL-F5
- click to "Content" button of "Soubor pro Slovník Metropolitního plánu ve verzi 3.5 návrh k projednání - slovník"
- now "loading page animation" is shown while loading the document
- after page is loaded go to "Vocabularies"
- go to "vocabulary of MPP-3.5" (i.e. Slovník Metropolitního plánu ve verzi 3.5 návrh k projednání - slovník)
- click to "Content" button of "Soubor pro Slovník Metropolitního plánu ve verzi 3.5 návrh k projednání - slovník" again
- now the issue is: "loading page animation" is not shown while loading the document and for MPP-3.5. it takes at least 15 sec to load on my computer