Keystrokes are registered multiple times

I've noticed that when typing the same character two times in the searchbox, the character gets registered 3 - 4 times. This results in wrong search results. This happens since we switched to iced_layershell which was merged in https://github.com/friedow/centerpiece/pull/204. 56697f1c36397c24b4378e71eb357cf2f020c088 is fine. 2c87b015d20ffa1405f3728e476dfcc886e5f0bf is broken. Steps to reproduce: 1. Open up centerpiece 2. Type `successfully` relatively fast 3. Notice how the characters C, S and L appear 3-4 times