[FL-1758] SubGhz refactoring part 1 (#689)

* SubGhz: refactoring
* WeGet: Add support for outputting formatted lines, events center button pressed, center button released
* Variable Item: slightly changed the display of data on the screen
* SubGhz: add show errors, add show preset, refactoring
* SubGhz: refactoring transmitter
* SubGhz: removed unused modules
* SubGhz: Add FuriHalSubGhzPresetOok270Async setting menu
* SubGhz: fix annotation
* SubGhz: add support Nero Radio

Co-authored-by: あく <alleteam@gmail.com>

applications/gui/modules/widget.h

@@ -26,6 +26,23 @@ void widget_clear(Widget* widget);
  */
 View* widget_get_view(Widget* widget);
 
+/** Add Multi String Element
+ * @param widget Widget instance
+ * @param x - x coordinate
+ * @param y - y coordinate
+ * @param horizontal - Align instance
+ * @param vertical - Align instance
+ * @param font Font instance
+ */
+void widget_add_string_multi_element(
+    Widget* widget,
+    uint8_t x,
+    uint8_t y,
+    Align horizontal,
+    Align vertical,
+    Font font,
+    const char* text);
+
 /** Add String Element
  * @param widget Widget instance
  * @param x - x coordinate