discord/uikit/HeaderBar find is no longer unique

[NotNite]

Breaks Image Viewer. Seems like a new find might be [".HEADER_BAR),", ".Divider"].

[Cynosphere]

I moved Image Viewer to use discord/components/common/BaseHeaderBar since that seems to be what this older path has become, as what it points to now is a version of the header bar that has authentication checks and such.

I'd probably want to rename it (if not both of these but BaseHeaderBar is fine enough) to reflect that it isn't apart of uikit anymore.