NetNewsWire 7.3b8 for Mac

• Added Gray theme — inspired by newsprint design but not meant to be a literal copy
• Added Plum theme — uses the same layout as the Gray theme but with color
• Added an optional grayscaleIcon key to theme Info.plist files — when true, the feed icon or author avatar in the article view is grayscale. The Gray theme uses this new feature
• Fixed a crash in the timeline (too many layout passes) caused by row-height measurement mixing up same articles from different accounts
• Fixed bug where deleting a feed could remove the wrong row (usually the next row) from the sidebar
• Fixed bug where restoring with no article selected, then clicking an article, would auto-scroll the article view