[Libreoffice] Calc Standard Filter behaviour

Hi,

I'd like to work on https://bugs.freedesktop.org/show_bug.cgi?id=34898 as my
first ever open source contribution but need some guidance to what the
actual behaviour should be.

Currently, when a minus symbol ("-") is entered, the condition combo box is
disabled and set to equals, regardless of the previous input. This is due to
the auto completion on the value combo box kicking in and selecting the
special "- not empty -" string. However, if the user overrides the auto
complete with a valid value (e.g. -5), the condition box is re-enabled but
stays on equals. I have a few possibilities for how it should behave:

1. Remember the original user-entered condition for each row in the filter
and replace the "=" with it if the user enters a non-special value.
2. Don't accept the auto complete value as final until some other user
interaction (e.g. the value combo box loses focus or the user clicks the OK
button) occurs.

Seems trivial but I don't want it to seem inconsistent. What would suit
LibreOffice best?

Also - is it best to discuss things like this here or on bugzilla?

Thanks,
Tibby