[Key: ?] Change help menu to backward search in quicklist

[PezCoder]

I have:

• looked through the issues, didn't find a similar issue
• Read the documentation section for ack-mappings

Description

When I run ack, there are times when i want to search for a particular file or keyword in the search results it provides & I end up searching using / normally but sometimes when i'm quite below or at the end of the opened quickfix list, I without thinking press ? which opens up help.

It would be really useful, if there is a way to disable it & just make it behave like a normal vim's ? to search backwards

My experiments

When i read this in the doc:

ack.vim/doc/ack.txt

Line 263 in eede042

To adjust these, see |g:ack_mappings|.

I thought i might be able to simply reset the mapping for ? by doing so:

let g:ack_mappings = { '?': '' }
// but this just closes the menu instead

Later i realised that maybe the behaviour of ? is not configurable when I saw this line:

ack.vim/autoload/ack.vim

Line 117 in 36e40f9

nnoremap <buffer> <silent> ? :call <SID>QuickHelp()<CR>

Questions

Is there way this can be achieved ?
Or if you think it could be useful can we make this as configuration ? (I would be happy to help.)