I'm putting this in bug reports rather than suggestions, because this is functionality which was present in v1.x and now missing in v2.x ... a bit cheeky I know 
In v1.x there is a checkbox "Search media only" in the search dropdown when viewing the gallery, which allows you to constrain your search to media items only rather than performing a site-wide search:
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This is not present in v2.x, forcing you to go to the advanced search page to do media-specific searches.
In v2.x, we have the following show up when viewing a forum:
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... or a thread:
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However, in the v2.x media gallery, we get no choice - it's a site-wide search or nothing, forcing you to use the advanced search to search media.
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At minimum, I would like to see the search box when viewing media, show two options: "Everywhere" and "Media only" to replicate the missing functionality from v1.x
It would be even better if it could be expanded to include the following options (depending on context):
- Everywhere
- Media only
- This category / This album
- This media item (for comment search)
I note that Resources gets this exact functionality - so I think media should too
