Might look like it, might also just be survivorship bias. Alot of crackpot ideas hit the wall instead of beeing a success. We only notice the successors and might think of them as the default, not the exception.
Not only desktop, but most mobile platforms as well. Beeing coded in a single C file makes it portable as hell. Their documentation is also a prime example, with great insight.
1. Talk to Kara, why she prefers her approach and not yours. Don't tell her that the icon is wrong. Ask her, if the icon could be changed to the other. Maybe she is right and you are wrong. She's the expert in this scenario, not you.
If shes professional and her approach is wrong, she will see the mistake and adopt your idea. After that, let it pass and don't go out and tell everyone she was wrong. That's not very humble and fair.
2. If you really think you are right, be subborn. Stubborn people are more successfull then non-stubborn people if you look at statistics. That's why most subborn people are working in management.
3. Don't approach disputes based on a single formula. Be diplomatic, stubborn, helping and supportive. Fight the good fight.