Ice 2 v2.9.10

Two small fixes found by expanding Ice 2's automated test suite.

• The menu bar color can no longer be calculated from an empty screen capture. When a capture of the menu bar area came back completely transparent — which can happen while displays are being reconfigured or right after waking from sleep — Ice 2 produced an invalid color and used it as if it were real, which could tint the Ice 2 Bar or the item search panel with a garbage color. Ice 2 now keeps the previous color instead.
• Faster lookup of the wallpaper behind the menu bar, about 40× quicker. It runs whenever Ice 2 refreshes the menu bar appearance overlay, the Ice 2 Bar, or the item search panel.
• More automated checks: the test suite grew from 162 to 261, now also covering menu bar image processing, appearance-settings upgrades, and menu bar window identification.

What's Changed

• release: v2.9.10 — fix NaN menu bar color, speed up wallpaper lookup by @teddychan in #47

Full Changelog: v2.9.9...v2.9.10