Added todo

todo.txt

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+- 'Place Sign' does not work. Landscaping - Place Sign works.
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+- Companies - Sort By arrow and text misaligned.
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+- Text input fields too small.
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+- Extra viewport window resize button is on a separate empty panel.
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+- Help - Tutorial opens console
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+- Subsidies list text too small.
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+- Sign list window is broken.
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+- Map of the world cannot be scrolled with one finger.
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+- Hide all windows when building something, add Confirm/Cancel dialog.
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+- Make tutorial window into a text list, add more videos.