Implementation of some widgets based on real use cases and designs [FL-392][FL-809] (#315)

* gui test app
* aligned string draw functions
* add canvas_invert_color, canvas_draw_button_left, canvas_draw_button_right
* use new str and button fns in dialog
* real dialog mockup
* add new gui test app recipe
* submenu module init
* delete unused variable
* move buttons to element, add canvas_string_width fn, new center button element
* button icons
* submenu module
* use submenu module, switch views
* keyboard buttons img
* new font for keyboard
* text input (keyboard) module
* add text input to gui test app
* add gui tesst app to release build, fix flags
* handle transition from start and end position, fix input switch
* add long text support to text input
* canvas_string_width and the underlying u8g2_GetStrWidth now return uint16_t
* remove deprecated libs and apps
* canvas_font_max_height fn
* new element, aligned multiline text
* use multiline text instead of plain string
* fix second keyboard row, rename uppercase fn
* qwerty-like keyboard layout
* new icons for iButton app
* better dialog text position and events handling
* remove confusing comment
* new extended dialog module
* extended dialog module usage
* update docs
* new gui module, popup with timeout
* popup usage
* canvas, remove outdated canvas_font_max_height, use canvas_current_font_height
* use furi check
* use new view_enter and view_exit callback for timers
* add DrZlo to gui tester codeowner

Co-authored-by: aanper <mail@s3f.ru>

applications/gui/modules/submenu.h

@@ -0,0 +1,36 @@
+#pragma once
+#include <gui/view.h>
+
+/* Submenu anonymous structure */
+typedef struct Submenu Submenu;
+typedef struct SubmenuItem SubmenuItem;
+typedef void (*SubmenuItemCallback)(void* context);
+
+/* Allocate and initialize submenu
+ * This submenu is used to select one option
+ */
+Submenu* submenu_alloc();
+
+/* Deinitialize and free submenu
+ * @param submenu - Submenu instance
+ */
+void submenu_free(Submenu* submenu);
+
+/* Get submenu view
+ * @param submenu - Submenu instance
+ * @return View instance that can be used for embedding
+ */
+View* submenu_get_view(Submenu* submenu);
+
+/* Add item to submenu
+ * @param submenu - Submenu instance
+ * @param label - menu item label
+ * @param callback - menu item callback
+ * @param callback_context - menu item callback context
+ * @return SubmenuItem instance that can be used to modify or delete that item
+ */
+SubmenuItem* submenu_add_item(
+    Submenu* submenu,
+    const char* label,
+    SubmenuItemCallback callback,
+    void* callback_context);