Added email as key creation restriction

source/ubl-settings-repomanager-key.c

@@ -16,6 +16,11 @@ void on_key_generate_accept(GtkWidget *self, key_creation_window* window){
         yon_ubl_status_highlight_incorrect(window->NameEntry);
         return;
     }
+    if (!yon_char_is_empty(email)&&strlen(email)<5){
+        yon_ubl_status_box_spawn(GTK_CONTAINER(window->StatusBox),NAME_SHORT_LABEL,5,BACKGROUND_IMAGE_FAIL_TYPE);
+        yon_ubl_status_highlight_incorrect(window->EmailEntry);
+        return;
+    }
     GtkWidget *highlight_target=NULL;
     if (yon_char_is_empty(name)){
         highlight_target=window->NameEntry;