Mass app fixes for new API

Thanks @Willy-JL for finding issues and fixing many of those apps
Other apps fixed by me

init_deinit.h

@@ -3,9 +3,6 @@
 #include "flizzer_tracker.h"
 #include "flizzer_tracker_hal.h"
 
-extern bool audio_modes_values[];
-extern char* audio_modes_text[];
-
 FlizzerTrackerApp* init_tracker(
     uint32_t sample_rate,
     uint8_t rate,

input_event.h

@@ -18,8 +18,6 @@
 extern bool audio_modes_values[];
 extern char* audio_modes_text[];
 
-void return_from_keyboard_callback(void* ctx);
-
 void overwrite_file_widget_yes_input_callback(GuiButtonType result, InputType type, void* ctx);
 void overwrite_file_widget_no_input_callback(GuiButtonType result, InputType type, void* ctx);
 

tracker_engine/do_effects.h

@@ -1,3 +1,5 @@
+#pragma once
+
 #include "tracker_engine_defs.h"
 #include <stdbool.h>
 #include <stdio.h>