404 on "Network" view when entering a nonexistent commit hash
On the "Network" view, there is a search box with a placeholder "Input an extended SHA1 syntax".
When entering an existing unique hash/tagname/branchname, it sets the pointer to that commit in the tree.
However, when entering a non-unique hash/nonexistent tagname etc. the entire page is replaced with a 404 message.
I would expect to receive a less disruptive error message, and be able to correct my input afterwards and continue searching.