UI: Remove LoadOutputSettings from save sequence

This removes the LoadOutputSettings() called in SaveStream1Settings.
It caused a bug when trying to save Output settings when both Stream
and Output settings have been changed but the changes have not been
applied by hitting the 'Apply' button in Settings.

Signed-off-by: pkv <pkv@obsproject.com>
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Gitea Version: 1.28.0+dev-477-g8b6ad49a5f