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_freqlist.hpp

@@ -50,6 +50,8 @@ class FreqManUIList : public Widget {
     void on_blur() override;
     bool on_key(const KeyEvent key) override;
     bool on_encoder(EncoderEvent delta) override;
+    bool on_keyboard(const KeyboardEvent event) override;
+
     void set_parent_rect(Rect new_parent_rect) override;
 
     void set_index(size_t index);