webdav: show folders with same name as current folder

[BrendanL79]

Tested and confirmed to work even when the subfolder name appears multiple times in the current folder's full path.
Closes #12783

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This change is 

[mergen3107]

1. Please add a comment in your first post that says "Closes URL", where URL is your original ticket. This will make GitHub close that issue once this PR is merged.

2. And you also don't have phantom folders too? See linked issue that I opened before (and because of which that PR was created).

Say, in folder a/a/, do you see phantom folder "a"?

[BrendanL79]

1. Please add a comment in your first post that says "Closes URL", where URL is your original ticket. This will make GitHub close that issue once this PR is merged.

   2. And you also don't have phantom folders too? See linked issue that I opened before (and because of which that PR was created).

Say, in folder a/a/, do you see phantom folder "a"?

No phantom folders! :)

[mergen3107]

Awesome! Thanks!