Can all search data be treated equally, as strings?

When typing search data in the main "Find Message" window or in the Filters->Comparison section of the prefs, I find it awkward that search text doesn't remain available when cycling through different options. For example, if I enter a name under the "From field", that name disappears from the string gadget for most other searches, like Subject, Message Body, Whole Message, etc. With the exception of "Message size", these are all still strings, and I wish YAM would stop second-guessing whether my data applies in this or that situation.

Moved from SF:
​https://sourceforge.net/tracker/?func=detail&aid=722875&group_id=13560&atid=363560