[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_elements/widget_element_i.h

@@ -6,6 +6,8 @@ typedef enum {
     GuiButtonTypeLeft,
     GuiButtonTypeCenter,
     GuiButtonTypeRight,
+    GuiButtonTypeCenterPress,
+    GuiButtonTypeCenterRelease,
 } GuiButtonType;
 
 typedef void (*ButtonCallback)(GuiButtonType result, void* context);
@@ -28,6 +30,15 @@ struct WidgetElement {
     Widget* parent;
 };
 
+/* Create multi string element */
+WidgetElement* widget_element_string_multi_create(
+    uint8_t x,
+    uint8_t y,
+    Align horizontal,
+    Align vertical,
+    Font font,
+    const char* text);
+
 /* Create string element */
 WidgetElement* widget_element_string_create(
     uint8_t x,