move the no ext app tile to forward (#2047)

* strong notice of missing ext app

* textual

* move the notice tile to front and remove the painter string

* remove notice icon

* format

* for back button

* remove <>

firmware/application/ui/ui_btngrid.cpp

@@ -4,6 +4,7 @@
  * Copyright (C) 2019 Elia Yehuda (z4ziggy)
  * Copyright (C) 2023 Mark Thompson
  * Copyright (C) 2024 u-foka
+ * Copyleft (ↄ) 2024 zxkmm with the GPL license
  *
  * This file is part of PortaPack.
  *
@@ -133,6 +134,19 @@ void BtnGridView::add_item(GridItem new_item) {
     }
 }
 
+void BtnGridView::insert_item(GridItem new_item, uint8_t position) {
+    if (!blacklisted_app(new_item)) {
+        if (position < menu_items.size()) {
+            auto pos_iter = menu_items.begin() + position;
+            menu_items.insert(pos_iter, new_item);
+            update_items();
+        } else {
+            menu_items.push_back(new_item);
+            update_items();
+        }
+    }
+}
+
 void BtnGridView::update_items() {
     size_t i = 0;
     Color bg_color = portapack::persistent_memory::menu_color();

firmware/application/ui/ui_btngrid.hpp

@@ -61,6 +61,7 @@ class BtnGridView : public View {
 
     void add_items(std::initializer_list<GridItem> new_items);
     void add_item(GridItem new_item);
+    void insert_item(GridItem new_item, uint8_t position);
     void set_max_rows(int rows);
     int rows();
     void clear();

firmware/application/ui_navigation.cpp

@@ -723,16 +723,17 @@ static void add_apps(NavigationView& nav, BtnGridView& grid, app_location_t loc)
 void addExternalItems(NavigationView& nav, app_location_t location, BtnGridView& grid) {
     auto externalItems = ExternalItemsMenuLoader::load_external_items(location, nav);
     if (externalItems.empty()) {
-        grid.add_item({"Notice",
+        grid.insert_item({"Notice!",
                           Color::red(),
-                       &bitmap_icon_debug,
+                          nullptr,
                           [&nav]() {
                               nav.display_modal(
                                   "Notice",
                                   "External app directory empty;\n"
                                   "see Mayhem wiki and copy apps\n"
                                   "to " + apps_dir.string() + " folder of SD card.");
-                       }});
+                          }},
+                         pmem::show_gui_return_icon() ? 1 : 0);
     } else {
         for (auto const& gridItem : externalItems) {
             grid.add_item(gridItem);