[gimp] app: improve a bit the restart-triggering change list.

[Jehan <jehanp src gnome org>]

commit f0dc690935fdc5f8ff6499dba08434dcbca47ef0
Author: Jehan <jehan girinstud io>
Date:   Wed Apr 27 15:35:33 2022 +0200

    app: improve a bit the restart-triggering change list.
    
    When you change a settings in Preferences which requires a restart of
    GIMP, the current list was pretty ugly. I am still not fond of the popup
    but at least now the list formatting is slightly better:
    
    - Use a unicode bullet point character in UTF-8 encoding (since
      gtk_message_dialog_new() expects UTF-8 input) on each list element,
      instead of just writing them without any kind of formatting.
    - Use the "nick" of the changed config, not the name. The "name" is an
      internal string which is really not meant to be viewed by people,
      while the "nick" is more like a short human-readable name or title,
      exactly what we want to show here.

 app/dialogs/preferences-dialog.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/app/dialogs/preferences-dialog.c b/app/dialogs/preferences-dialog.c
index 1586253af2..67581ffc4e 100644
--- a/app/dialogs/preferences-dialog.c
+++ b/app/dialogs/preferences-dialog.c
@@ -388,7 +388,10 @@ prefs_response (GtkWidget *widget,
               {
                 GParamSpec *param_spec = list->data;
 
-                g_string_append_printf (string, "%s\n", param_spec->name);
+                /* The first 3 bytes are the bullet unicode character
+                 * for doing a list (U+2022).
+                 */
+                g_string_append_printf (string, "\xe2\x80\xa2 %s\n", g_param_spec_get_nick (param_spec));
 
                 if (g_strcmp0 (param_spec->name, "language") == 0)
                   {