Fix test

src/app.rs

@@ -1105,7 +1105,7 @@ impl App {
             .and_then(App::reset_input_buffer)
     }
 
-    fn switch_mode_keeping_input_buffer(mut self, mode: &str) -> Result<Self> {
+    fn switch_mode_keeping_input_buffer(self, mode: &str) -> Result<Self> {
         if self.config.modes.builtin.contains_key(mode) {
             self.switch_mode_builtin(mode)
         } else if self.config.modes.custom.contains_key(mode) {
@@ -1165,7 +1165,7 @@ impl App {
         }
     }
 
-    fn switch_layout(mut self, layout: &str) -> Result<Self> {
+    fn switch_layout(self, layout: &str) -> Result<Self> {
         if self.config.layouts.builtin.contains_key(layout) {
             self.switch_layout_builtin(layout)
         } else if self.config.layouts.custom.contains_key(layout) {

src/config.rs

@@ -537,6 +537,12 @@ pub struct ModesConfig {
     pub custom: HashMap<String, Mode>,
 }
 
+impl ModesConfig {
+    pub fn get(&self, name: &str) -> Option<&Mode> {
+        self.builtin.get(name).or_else(|| self.custom.get(name))
+    }
+}
+
 #[derive(Debug, Clone, Default, Serialize, Deserialize, PartialEq, Eq)]
 #[serde(deny_unknown_fields)]
 pub struct PanelUiConfig {