Latest liquid-glass icons don't comply with macOS/iOS/iPadOS 26 mask

[ChristianAhrens]

[ChristianAhrens]

Currently, a .icon resource is available in repo, but so far cannot be used directly with Projucer (?). Therefor .png exports are used, that cause the issue.
As soon as an official solution for .icon usage is available, that should be used to solve this.
https://forum.juce.com/t/appicon-now-surrounded-by-round-rectange-on-macos-26/67231/9