Fix App Listing Quality on FlatHub

[xarbit]

• fixes: Has primary brand colors
• fixes: Icon doesn't fill too much or too little of the canvas
• fixes: Summary, no weird formatting or punctuation

[flathubbot]

Started test build 131317

[flathubbot]

Build 131317 failed

[flathubbot]

Started test build 131337

[flathubbot]

Build 131337 successful To test this build, install it from the testing repository:

flatpak install --user https://dl.flathub.org/build-repo/114338/com.prusa3d.PrusaSlicer.flatpakref

[xarbit]

[flathubbot]

Started test build 131356

[flathubbot]

Started test build 131357

[flathubbot]

Build 131356 successful To test this build, install it from the testing repository:

flatpak install --user https://dl.flathub.org/build-repo/114357/com.prusa3d.PrusaSlicer.flatpakref

[flathubbot]

Build 131357 successful To test this build, install it from the testing repository:

flatpak install --user https://dl.flathub.org/build-repo/114358/com.prusa3d.PrusaSlicer.flatpakref

[Riksu9000]

I was surprised to see a different icon, but it looks like it is based on the official mac icon.

[xarbit]

@Riksu9000
Basically it is yes :-), I actually initially created the official mac icon for PrusaSlicer and reused it .. https://github.com/xarbit/PrusaSlicer-macOS-icons But I am not satisfied with them, I still get issues for the App Listing Quality on flathub.