[FL-1758, FL-1790] SubGhz refactoring part 2, fix generation of a new GateTX serial (#696)

* WidGet: fix name  Multiline String Element
* SubGhz: rename  SubGhzProtocol to SubGhzParser and bring it up
* SubGhz: a new way to navigate in receiver views
* SubGhz: fix syntax
* WedGet: add forwarding input type to wedget button callback, fix using a callback in an application
* SubGhz: add assertions and status checks
* SubGhz: fix syntax
* [FL-1790] SubGhz: fix GateTX
* SubGhz:  add 434.42 MHz frequency support
* SubGhz: rename type protocol, add decoder stage names
* SubGhz: fix navigation through received signals when changing scenes
* SubGhz: fix 2-fsk config

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

applications/gui/modules/widget_elements/widget_element_string_multiline.c

@@ -0,0 +1,67 @@
+#include "widget_element_i.h"
+#include <m-string.h>
+#include <gui/elements.h>
+
+typedef struct {
+    uint8_t x;
+    uint8_t y;
+    Align horizontal;
+    Align vertical;
+    Font font;
+    string_t text;
+} GuiStringMultiLineModel;
+
+static void gui_string_multiline_draw(Canvas* canvas, WidgetElement* element) {
+    furi_assert(canvas);
+    furi_assert(element);
+    GuiStringMultiLineModel* model = element->model;
+
+    if(string_size(model->text)) {
+        canvas_set_font(canvas, model->font);
+        elements_multiline_text_aligned(
+            canvas,
+            model->x,
+            model->y,
+            model->horizontal,
+            model->vertical,
+            string_get_cstr(model->text));
+    }
+}
+
+static void gui_string_multiline_free(WidgetElement* gui_string) {
+    furi_assert(gui_string);
+
+    GuiStringMultiLineModel* model = gui_string->model;
+    string_clear(model->text);
+    free(gui_string->model);
+    free(gui_string);
+}
+
+WidgetElement* widget_element_string_multiline_create(
+    uint8_t x,
+    uint8_t y,
+    Align horizontal,
+    Align vertical,
+    Font font,
+    const char* text) {
+    furi_assert(text);
+
+    // Allocate and init model
+    GuiStringMultiLineModel* model = furi_alloc(sizeof(GuiStringMultiLineModel));
+    model->x = x;
+    model->y = y;
+    model->horizontal = horizontal;
+    model->vertical = vertical;
+    model->font = font;
+    string_init_set_str(model->text, text);
+
+    // Allocate and init Element
+    WidgetElement* gui_string = furi_alloc(sizeof(WidgetElement));
+    gui_string->parent = NULL;
+    gui_string->input = NULL;
+    gui_string->draw = gui_string_multiline_draw;
+    gui_string->free = gui_string_multiline_free;
+    gui_string->model = model;
+
+    return gui_string;
+}