[GIT PULL] git-gui: question helper, fix Revert Changes

> The following changes since commit e3923e3e90da55e12545b5ef5aa34f21e97409d8:
>
>   Merge branch 'cb/no-tcl86-on-macos' (2025-08-04 18:27:03 +0200)
>
> are available in the Git repository at:
>
>   https://github.com/j6t/git-gui.git master
>
> for you to fetch changes up to 7ef77ec0054b3b4ef3cfee6ef97c43c01965be88:
>
>   git-gui: sync Makefiles with git.git (2025-09-06 11:59:48 +0200)
>
> ----------------------------------------------------------------
> Adam Dinwoodie (1):
>       git-gui: sync Makefiles with git.git
>
> Heiko Voigt (1):
>       git-gui: provide question helper for retry fallback on Windows
>
> Johannes Schindelin (3):
>       git gui: set GIT_ASKPASS=git-gui--askpass if not set yet
>       git-gui--askyesno: allow overriding the window title
>       git-gui--askyesno (mingw): use Git for Windows' icon, if available
>
> Johannes Sixt (3):
>       git-gui: fix error handling of Revert Changes command
>       Merge branch 'js/ask-yesno'
>       Merge branch 'ml/misc-simplifications'
>
> Mark Levedahl (2):
>       git-gui: simplify PATH de-duplication
>       git-gui: simplify using nice(1)
>
>  Makefile             |  3 +++
>  git-gui--askyesno    | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++++
>  git-gui.sh           | 42 ++++++++++++-----------------------
>  lib/index.tcl        |  7 +++++-
>  po/glossary/Makefile |  3 +++
>  5 files changed, 89 insertions(+), 29 deletions(-)
>  create mode 100755 git-gui--askyesno