Various improvements and fixes (#131)

- Added a custom spinner using the Tactility logo
- Fix for crash in version logging
- Make file browsing less verbose in log
- Fix memory leak in FileUtils
- Fix bug when display brightness was set to 255: after reboot it would be set to 0
- Smaller boot logo (removed empty space)

Tactility/Source/lvgl/Spinner.cpp

@@ -0,0 +1,53 @@
+#define LV_USE_PRIVATE_API 1 // For actual lv_obj_t declaration
+
+#include "lvgl.h"
+#include "CoreDefines.h"
+#include "Log.h"
+
+static void tt_spinner_constructor(const lv_obj_class_t* object_class, lv_obj_t* object);
+
+const lv_obj_class_t tt_spinner_class = {
+    .base_class = &lv_image_class,
+    .constructor_cb = tt_spinner_constructor,
+    .destructor_cb = nullptr,
+    .event_cb = nullptr,
+    .user_data = nullptr,
+    .name = "tt_spinner",
+    .width_def = 0,
+    .height_def = 0,
+    .editable = 0,
+    .group_def = 0,
+    .instance_size = 0,
+    .theme_inheritable = 0
+};
+
+lv_obj_t* tt_spinner_create(lv_obj_t* parent) {
+    lv_obj_t* obj = lv_obj_class_create_obj(&tt_spinner_class, parent);
+    lv_obj_class_init_obj(obj);
+
+    lv_image_set_src(obj, "A:/assets/spinner.png");
+
+    return obj;
+}
+
+static void anim_rotation_callback(void* var, int32_t v) {
+    auto* object = (lv_obj_t*) var;
+    auto width = lv_obj_get_width(object);
+    auto height = lv_obj_get_width(object);
+    lv_obj_set_style_transform_pivot_x(object, width / 2, 0);
+    lv_obj_set_style_transform_pivot_y(object, height / 2, 0);
+    lv_obj_set_style_transform_rotation(object, v, 0);
+}
+
+static void tt_spinner_constructor(TT_UNUSED const lv_obj_class_t* object_class, lv_obj_t* object) {
+    lv_obj_remove_flag(object, LV_OBJ_FLAG_CLICKABLE);
+
+    lv_anim_t a;
+    lv_anim_init(&a);
+    lv_anim_set_var(&a, object);
+    lv_anim_set_values(&a, 0, 3600);
+    lv_anim_set_duration(&a, 800);
+    lv_anim_set_repeat_count(&a, LV_ANIM_REPEAT_INFINITE);
+    lv_anim_set_exec_cb(&a, anim_rotation_callback);
+    lv_anim_start(&a);
+}