Don't derive Default for GlobalConfig (#297)

We shouldn't derive Default because `lsp_progress` by default should be turned on (opt out).

helix-term/src/config.rs

@@ -5,11 +5,16 @@ use serde::{de::Error as SerdeError, Deserialize, Serialize};
 
 use crate::keymap::{parse_keymaps, Keymaps};
 
-#[derive(Default)]
 pub struct GlobalConfig {
     pub lsp_progress: bool,
 }
 
+impl Default for GlobalConfig {
+    fn default() -> Self {
+        Self { lsp_progress: true }
+    }
+}
+
 #[derive(Default)]
 pub struct Config {
     pub global: GlobalConfig,