Okay.
I'm genuinely curious as to how you think listing one tag for multiple apps on the "Manage Tags" page would be useful, or if you've seen use cases? From my personal use, I can investigate where the tag is used by clicking on Search which should reveal how and where it's used. My main purpose when managing tags is to get an overarching perspective on duplicate / erroneous tags ... knowing in what app the tag is used isn't even on my priority list. But I would be curious as to how other admins utilize the tag's app-usage.
Maybe an immediate workaround is when I edit a tag, I am taken back to the page with the tag (eg. Page 5), instead of starting from Page 1 again. That, by itself, would be a huge pick-up in terms of admin efficiency.
I have 48 pages of tags and you're killing me here @Ryan H.