Symbolic links for folders and files share the same icon

[DeeGeeMan]

There should be different symlink icons for folders and files in lf. A folder in lf is showing a file symlink icon which is confusing, Ranger shows two distinct icons for symlinks.

[ghost]

You actually don't need an icon. lf colors symlinks as green. And status bar even shows the pointer location when you're on it.
Also, you can distinguish between a file symlink & folder symlink easily, caz folders listed before files bydefault.

[joelim-work]

Added in #1644. To show icons based on the symbolic link target, use target instead of an actual icon like below:

icons file:

ln	target
di	d
fi	f