Select hash for context and SHA1 & MD5

Hello,

at the moment, the :mag: "Select hash for context" is shown over all hashes, but it only works for SHA256. Best solution would of course be to also support MD5 & SHA1. (Should be easy as it only searches for the name?)

The issue names the "Select hash for context" action but no files or tests. Locate the existing SHA256 selection implementation and its entry point, then trace how hash names are matched. Done means the action also selects MD5 and SHA1 contexts, with existing behavior preserved for SHA256.

Written by the indexing model from the issue text.