[Bug Report] "incorrect" summary of space used at the top of scene page

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Don't know if its wanted behaviour or not but...

Describe the bug
When you go to the scenes tab and you have scenes filtered which contain several files, the summary on top (e.q. 1-20 of 20
(9h 43m 46s - 22.8 GB)) shows only the size of all primary files. Not duplicates.

For example you have filtered down to only one scene. This scene contains 2 files @ 2 GB. The summary on top of the scene tab, shows 2GB instead of 4GB

Expected behavior
I would have expected it shows me the complete space used.

Stash Version: (from Settings -> About):
v0.27.2