Hi Heminate,
thanks for the suggestion. The idea is interesting (at least new for me, I only know such kind of preview in file open dialog).
But form another side, from UI perspective it is not very obvious how to implement it in a way that users will find and use it. The solution with shortcuts nobody will find, and very few people will read docu or forum... What you suggest, is a function often seen in file managers as quick view or preview (Total Commander, or Far or old Norton Commander). And by fact it suits to them better. Because alos fit by UI.
Also with suggestion of Stefan with Locked file, it will not became more clear for users.
One more solution I have seen was in Visual Studio with reuse of non-modified files on Open (new file is open in old tab, if document inside was not modified).
Probably extending of File Explorer with some additional buttons (better to create new button row for file list) with shortcuts for navigation can be a solution, but I will not say that I really like it... But I will keep this in mind. If I will see some good design for this, it can be added.
Best regards,
Alex.