Change how preset brushes are displayed

• Text Only to view the brushes as a list.
• Small or Large Thumbnail to view the brushes as thumbnails.
• Small or Large List to view the brushes as a list with thumbnails.
• Stroke Thumbnail to view a sample brush stroke with each brush thumbnail.
  To dynamically preview brush strokes in the Brushes panel, make sure that Brush Preset is selected, and then position the pointer over a brush until the tool tip appears. Move the pointer over different brushes. The preview area at the bottom of the panel will display sample brush strokes.

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