Change label of "Open File" for folders

[lrasmus]

When the user selects a folder from the Assets tree, the button currently displays "Open File". If the asset is a folder, we want the button to say "Open Folder"

[adityai0]

@lrasmus I would like to work on this

[adityai0]

Thanks for assigning me this issue. I'll start working on this issue and update here shortly!