Diff with... and search doesn't work

[psrok1]

Environment information

• MWDB version (from /about): v2.10.1
• Installation method:
  • mwdb.cert.pl service
  • From PyPi (pip install mwdb-core)
  • From docker-compose
  • Other (please explain)
• Plugins installed:

Behaviour the bug (what happened?)

When we use query in Diff with mode, we escape the Diff with mode and we're landing in regular search.

Expected behaviour

We should still be in Diff with mode after making a query.

Reproduction Steps

1. Go to a blob
2. Click on Diff with option
3. Make a query e.g. by clicking on blob type to filter
4. We're redirected to the regular search because the ?diff= part of query is lost