Handle some more numpad keys

Follow up of neovide#2032

See neovim docs [0] as well as winit's [1].

[0] https://github.com/neovim/neovim/blob/1bf645918e94e7e8f770592484164f1ee303f24e/runtime/doc/intro.txt#L377-L379
[1] https://docs.rs/winit/0.29.10/winit/keyboard/enum.KeyCode.html#variant.NumpadComma

src/window/keyboard_manager.rs

@@ -95,7 +95,19 @@ impl KeyboardManager {
             KeyCode::NumpadSubtract => Some("kMinus"),
             KeyCode::NumpadAdd => Some("kPlus"),
             KeyCode::NumpadEnter => Some("kEnter"),
-            KeyCode::NumpadDecimal => Some("kDel"),
+            KeyCode::NumpadEqual => Some("kEqual"),
+            KeyCode::NumpadDecimal | KeyCode::NumpadComma => {
+                if is_numlock_key {
+                    let numlock_str = match key_event.logical_key.as_ref() {
+                        Key::Character(",") => Some("kComma"),
+                        Key::Character(".") => Some("kPoint"),
+                        _ => key_event.logical_key.to_text(),
+                    };
+                    numlock_str
+                } else {
+                    Some("kDel")
+                }
+            }
             KeyCode::Numpad9 => {
                 KeyboardManager::handle_numpad_numkey(is_numlock_key, "k9", "kPageUp")
             }