[Bug 46046] New: Keys which have valid keysyms (and unicode character) not works, if they not fit to 101key-like layout

https://bugs.winehq.org/show_bug.cgi?id=46046

Bug ID: 46046
           Summary: Keys which have valid keysyms (and unicode character)
                    not works, if they not fit to 101key-like layout
           Product: Wine
           Version: 3.18
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: winex11.drv
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

I have custom (written via XKB) keyboard layout, based on US, but have extra 33
keys for cyrillic symbols allocated from unused scancodes (210-243 range). All
of them have proper keysyms, and issue proper unicode characters (so
XLookupString/XmbLookupString return valid values). But wine completely ignores
all of them (tested on notepad).

I include log, produced by following command:
WINEDEBUG=+key,+keyboard,+xim wine notepad.exe >notepad.log 2>&1

(Inside notepad I typed "hello" and "привет" delimited by "Return" key. Russian
word contain following keys [Cyrillic_pe, Cyrillic_er, Cyrillic_i, Cyrillic_ve,
Cyrillic_ie, Cyrillic_te]).

As well, I include my patch (which looks very brute force), which mark all
these keys to VK_NONCONVERTABLE (just unused VK) and preserve scancode in
unused event field, then restore all back inside ToUnicodeEx). I clearly
understand, that my solution is bad, and create this report to look for
appropriate fix.