Merge branch 'g4w-gitk' of https://github.com/dscho/gitk

* 'g4w-gitk' of https://github.com/dscho/gitk: gitk: make the "list references" default window width wider gitk: fix arrow keys in input fields with Tcl/Tk >= 8.6 gitk: Use an external icon file on Windows gitk: Unicode file name support gitk(Windows): avoid inadvertently calling executables in the worktree Signed-off-by: Johannes Sixt <j6t@kdbg.org>