Dialogs for UE4.21 Editor and Runtime
Uses default Unreal Engine 4.21 dialogs for editor versions and TinyFileDialogs for Packaged builds.
Unreal Engine 4 functions based on Doublezer0 implementation https://github.com/Doublezer0/TinyFileDialogsUE4
Uses TinyFileDialogs from https://sourceforge.net/projects/tinyfiledialogs/