keymap_ui: Only show conflicts between user bindings (#34284)

Closes #ISSUE

This makes it so conflicts are only shown between user bindings. User
bindings that override bindings in the Vim, Base, and Default keymaps
are not identified as conflicts

Release Notes:

- N/A *or* Added/Fixed/Improved ...

Co-authored-by: Anthony <anthony@zed.dev>

crates/settings_ui/src/keybindings.rs

@@ -193,7 +193,13 @@ impl ConflictState {
         key_bindings
             .iter()
             .enumerate()
-            .filter(|(_, binding)| !binding.keystroke_text.is_empty())
+            .filter(|(_, binding)| {
+                !binding.keystroke_text.is_empty()
+                    && binding
+                        .source
+                        .as_ref()
+                        .is_some_and(|source| matches!(source.0, KeybindSource::User))
+            })
             .for_each(|(index, binding)| {
                 action_keybind_mapping
                     .entry(binding.get_action_mapping())