External module api (#2290)

* added external module debug view

* integrated module driver into i2c subsystem

* implemented i2c app loader

* added view mirror api

* fixed build

* added i2c to module api

* implemented standalone app touch event

* implemented focus management

* reverted formating change

* refactoring

* refactoring

* implemented events

* fixed memory usage

firmware/common/ui_widget.cpp

@@ -94,8 +94,14 @@ void Widget::set_parent(Widget* const widget) {
         visible(false);
     }
 
+    if (widget == nullptr)
+        on_before_detach();
+
     parent_ = widget;
 
+    if (widget != nullptr)
+        on_after_attach();
+
     set_dirty();
 }