• Fixed Open File dialog showing all files filter by default instead of image files.
• Fixed Preview and Cancel creating undo steps in transparent dialog.
• Fixed certain strings not translatable.
• Fixed transparent dialog not restoring previous tool.
• Fixed transparent dialog incorrect window type preventing left click.
• Fixed canvas dialog not defaulting to current image size.
• Fixed pasted image visibility issue.
• Added Portuguese translations (pt_PT, pt_BR).
• Cleanup of code and unused imports.