Changes

• Added Quixel Privacy Policy and Unity's Data Privacy Page URLs to the About page
• Fixed ColorPicker not updating with the Preview toggle in some cases
• Fixed bugs causing the Mixer to not load/create new mixes in some cases
• Separated out Brush and Eraser settings
• Added HDPI support on Windows, with a toggle in Preferences->User Interface
• Online search: selecting a category/subcategory clears the search field
• Online search: searching a keyword in the search field clears the selected category to All
• Fixed some bugs with library not refreshing correctly in some cases