This duplicates https://github.com/j6t/gitk/issues/18. I found a regression in `gitk`'s commit 904b36b. When `gitk` is run with `want_ttk=0` (AKA "use themed widgets" set to off), I cannot open the settings dialog since that commit. It gives the following error in a modal dialog, and then opens a completely empty non-modal dialog where the settings dialog should be: ``` `invalid command name "::combobox" invalid command name "::combobox" while executing "${NS}::combobox $page.wrapcomment -values {none char word} -state readonly -textvariable wrapcomment" (procedure "prefspage_general" line 43) invoked from within "prefspage_general $notebook" (procedure "doprefs" line 27) invoked from within "doprefs" (procedure "::tk::mac::ShowPreferences" line 1) invoked from within "::tk::mac::ShowPreferences"` ``` Indeed, 904b36b adds some `::combobox`es. I tested this on MacOS with Tcl/Tk 8.6, both with Homebrew-installed `gitk` from the `git-gui` 2.49.0 package, and with the master branch of https://github.com/j6t/gitk (commit 9f27318), and with that repo's 904b36b. The parent of 904b36b works fine. The workaround is to close gitk, and set `want_ttk` to 1 in ~/.config/git/gitk, ~/.gitk, or equivalent. Completely deleting the config file at ~/.config/git/gitk also fixed the problem for me. Ilya.
