Minor style changes of action confirmation dialog

source/libublsettingsui-gtk3.c

@@ -344,14 +344,25 @@ void yon_confirmation_dialog_call(GtkWidget *self,dialog_confirmation_data *data
     gtk_window_set_title(GTK_WINDOW(dialog),template_app_information.app_title);
     gtk_widget_set_size_request(dialog,450,-1);
 
+    GtkWidget *header_label = gtk_label_new(template_app_information.app_title);
+    gtk_widget_show(header_label);
+    PangoAttrList *attributes = pango_attr_list_new();
+    PangoAttribute *boldAttr = pango_attr_weight_new(PANGO_WEIGHT_BOLD);
+    pango_attr_list_insert(attributes, boldAttr);
+    gtk_label_set_attributes(GTK_LABEL(header_label),attributes);
+
     GtkWidget *header = gtk_header_bar_new();
-    gtk_header_bar_set_title(GTK_HEADER_BAR(header),template_app_information.app_title);
+    gtk_header_bar_set_custom_title(GTK_HEADER_BAR(header),header_label);
     gtk_header_bar_set_show_close_button(GTK_HEADER_BAR(header),1);
     gtk_widget_show(header);
     gtk_window_set_titlebar(GTK_WINDOW(dialog),header);
 
     GtkWidget *image = gtk_image_new_from_icon_name("dialog-question-symbolic",GTK_ICON_SIZE_DIALOG);
     gtk_widget_show(image);
+    gtk_widget_set_margin_start(image,20);
+    gtk_widget_set_margin_end(image,20);
+    gtk_widget_set_margin_bottom(image,20);
+    gtk_widget_set_margin_top(image,20);
 
     GtkWidget *label = gtk_label_new(data->action_text);
     gtk_widget_show(label);