Ignore Ime::Enabled event on Linux

It means different things on X11 and Wayland, and causes us to assume
IME is active when it isn't, causing the backspace and arrow keys to be
disabled.

crates/egui-winit/src/lib.rs

@@ -344,7 +344,13 @@ impl State {
                 // between Commits.
                 match ime {
                     winit::event::Ime::Enabled => {
-                        self.ime_event_enable();
+                        if cfg!(target_os = "linux") {
+                            // This event means different things in X11 and Wayland, but we can just
+                            // ignore it and enable IME on the preedit event.
+                            // See <https://github.com/rust-windowing/winit/issues/2498>
+                        } else {
+                            self.ime_event_enable();
+                        }
                     }
                     winit::event::Ime::Preedit(text, Some(_cursor)) => {
                         self.ime_event_enable();