Bugbug-inbox improvements for search function

I use the Search function from the bugbug-inbox tool quite a lot to pinpoint/select specific emails received during tests.

At the moment the search is quite strict, in the sense that you need to input the case-sensitive words from subject title in the Search box.

Example of email:

If I type only "test" then 0 results are displayed:

If I type "Test" then I get the proper match:

But an improvement for me would be for the search to include matches of keywords from inside the email body as well.

For example, I have the following email body:

If I search in the inbox for "pizza" then it would be nice if the matching email(s) containing the keyword inside the body would be displayed as results. 😁