Send ASCII chars from USB serial to selected widget (#1708)

* Initial commit for keyboard emulation
* Added on_keyboard to some widgets
* TextEdit partly
* Multi key send at once
* Frequency control support
* Fix encoder emulation
* Add keyboard to geomap
* More widgets

firmware/application/ui/ui_geomap.hpp

@@ -162,6 +162,7 @@ class GeoMap : public Widget {
 
     bool on_touch(const TouchEvent event) override;
     bool on_encoder(const EncoderEvent delta) override;
+    bool on_keyboard(const KeyboardEvent event) override;
 
     bool init();
     void set_mode(GeoMapMode mode);