[gimp/nielsdg/plug-ins-migrate-gtkaction: 4/5] libgimpwidgets: use "system-help" for GIMP_ICON_HELP.

[Jehan <jehanp src gnome org>]

commit dc8298ce76ab8d0b7a0bd6bc5d5d6f94e7a72a3c
Author: Jehan <jehan girinstud io>
Date:   Tue Oct 11 21:14:51 2022 +0200

    libgimpwidgets: use "system-help" for GIMP_ICON_HELP.
    
    Just "help" is not one of the standard icon names as per the Freedesktop Icon
    Naming specification.
    See: https://specifications.freedesktop.org/icon-naming-spec/icon-naming-spec-latest.html
    
    Therefore when using this name, we usually don't have any icon (especially as we
    don't provide any in our own icon themes).
    Use "system-help" instead which is a standard name 'for the “Help” system
    category'.

 libgimpwidgets/gimpicons.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/libgimpwidgets/gimpicons.h b/libgimpwidgets/gimpicons.h
index 43646df45c..e59501cee6 100644
--- a/libgimpwidgets/gimpicons.h
+++ b/libgimpwidgets/gimpicons.h
@@ -265,7 +265,7 @@ G_BEGIN_DECLS
 #define GIMP_ICON_GO_PREVIOUS               "go-previous"
 #define GIMP_ICON_GO_NEXT                   "go-next"
 
-#define GIMP_ICON_HELP                      "help"
+#define GIMP_ICON_HELP                      "system-help"
 #define GIMP_ICON_HELP_ABOUT                "help-about"
 #define GIMP_ICON_HELP_USER_MANUAL          "gimp-user-manual"