updated insert modes + fixed status bar help

src/config.rs

@@ -106,6 +106,8 @@ pub struct KeybindsConfig {
     pub down: String,
     pub up: String,
     pub edit: String,
+    pub edit_append: String,
+    pub edit_substitute: String,
     pub save: String,
     pub quit: String,
     pub normal_mode: String,
@@ -125,6 +127,8 @@ impl Default for KeybindsConfig {
             down: "j".to_string(),
             up: "k".to_string(),
             edit: "i".to_string(),
+            edit_append: "A".to_string(),
+            edit_substitute: "S".to_string(),
             save: ":w".to_string(),
             quit: ":q".to_string(),
             normal_mode: "Esc".to_string(),