Spacebar not canceling dead keys - fixed upstream

Please backport upstream patch to fix spacebar not canceling dead keys until ibus 1.5.34 is released

ibus 1.5.33 has a serious bug that prevents typing diacritics properly in some locales (el_GR.UTF-8, fi_FI.UTF-8, pt_BR.UTF-8), as the spacebar no longer cancels dead keys. The issue has been identified and fixed upstream:

https://github.com/ibus/ibus/issues/2825
https://bugzilla.redhat.com/show_bug.cgi?id=2413790

Reference Fedora backport:

https://src.fedoraproject.org/rpms/ibus/c/22dbdb3c2881c6326d36cb6be5e7f805c5be741c