MediBang Paletta：Drawing App

[New Features] - Added stopwatch display [Improvements] - Improved functionality so that a save confirmation dialog is displayed when attempting to return to the home screen without saving the canvas after toggling layer visibility/hide. [Bug Fixes] - Fixed a bug that could cause crashes during drawing. - Fixed a bug that could cause crashes during pinch zoom. - Fixed a bug that could cause crashes on startup. - Fixed a bug where settings were reset when rotating the screen in the color wheel tab and slider tab. - Fixed a bug where the tab state was not retained when rotating the screen in the custom noise and focus lines filters. - Fixed a bug where the UI was corrupted when narrowing the iPad window. - Fixed a bug where the placement of custom presets was misaligned in iPhone landscape mode. - Fixed a bug where drawing with a brush was possible after creating a panel layout. - Fixed a bug where the eraser category was sometimes displayed in the brush window. - Fixed a bug where the loading display remained when canceling canvas creation with an image larger than 10000px. - Fixed a bug where crashes occurred when creating or importing canvases with an image larger than 20000px. - Corrected the warning message when manipulating locked layers. - Fixed an issue where duplicating a lasso eraser did not reflect in the history. - Fixed an issue where deleting and restoring a duplicated lasso eraser did not restore it. - Fixed the behavior of the layer details popup.