fix(ui): ListView decrement selected on remove

When removing an element, it is important to check whether it was the
last element in the list and decrement the selected index if so.

src/ui/listview.rs

@@ -188,9 +188,17 @@ impl<I: ListItem + Clone> ListView<I> {
         }
     }
 
-    pub fn remove(&self, index: usize) {
+    /// Remove the item at `index` from the list.
+    ///
+    /// # Panics
+    ///
+    /// Panics if `index` is out of bounds.
+    pub fn remove(&mut self, index: usize) {
         let mut c = self.content.write().unwrap();
         c.remove(index);
+        if self.selected >= c.len() {
+            self.selected = self.selected.saturating_sub(1);
+        }
     }
 }