[FL-2556] Update complete screen (#1332)

* Desktop: slideshow implementation
* Updater: handling splashscreen installation; added format version field to slideshow binary
* Desktop: added bidirectional slideshow navigation + instant cancel by "back" button; Updater: rebalanced update stages weights
* Updater: fixed missing field init; fixed potential loop when baking slideshows
* Assets: fixed "update complete" image to match original
* Desktop: added check for slideshow file version
* Scripts: slideshow.py cleanup
* Desktop: removed first start intro sequence
* Desktop: removed first start remnants

applications/desktop/desktop_i.h

@@ -6,9 +6,9 @@
 #include "views/desktop_view_pin_input.h"
 #include "views/desktop_view_locked.h"
 #include "views/desktop_view_main.h"
-#include "views/desktop_view_first_start.h"
 #include "views/desktop_view_lock_menu.h"
 #include "views/desktop_view_debug.h"
+#include "views/desktop_view_slideshow.h"
 #include "desktop/desktop_settings/desktop_settings.h"
 
 #include <furi.h>
@@ -28,10 +28,10 @@ typedef enum {
     DesktopViewIdLockMenu,
     DesktopViewIdLocked,
     DesktopViewIdDebug,
-    DesktopViewIdFirstStart,
     DesktopViewIdHwMismatch,
     DesktopViewIdPinInput,
     DesktopViewIdPinTimeout,
+    DesktopViewIdSlideshow,
     DesktopViewIdTotal,
 } DesktopViewId;
 
@@ -43,13 +43,13 @@ struct Desktop {
     ViewDispatcher* view_dispatcher;
     SceneManager* scene_manager;
 
-    DesktopFirstStartView* first_start_view;
     Popup* hw_mismatch_popup;
     DesktopLockMenuView* lock_menu;
     DesktopDebugView* debug_view;
     DesktopViewLocked* locked_view;
     DesktopMainView* main_view;
     DesktopViewPinTimeout* pin_timeout_view;
+    DesktopSlideshowView* slideshow_view;
 
     ViewStack* main_view_stack;
     ViewStack* locked_view_stack;