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.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();