Mute mics by default

Fix bug when file ends in line with 1 more digit displayed than previous lines
Remove stale UI elements from voice call development

crates/call/src/call_settings.rs

@@ -0,0 +1,27 @@
+use schemars::JsonSchema;
+use serde_derive::{Serialize, Deserialize};
+use settings::Setting;
+
+#[derive(Deserialize, Debug)]
+pub struct CallSettings {
+    pub mute_on_join: bool,
+}
+
+#[derive(Clone, Default, Serialize, Deserialize, JsonSchema, Debug)]
+pub struct CallSettingsContent {
+    pub mute_on_join: Option<bool>,
+}
+
+impl Setting for CallSettings {
+    const KEY: Option<&'static str> = Some("calls");
+
+    type FileContent = CallSettingsContent;
+
+    fn load(
+        default_value: &Self::FileContent,
+        user_values: &[&Self::FileContent],
+        _: &gpui::AppContext,
+    ) -> anyhow::Result<Self> {
+        Self::load_via_json_merge(default_value, user_values)
+    }
+}