Stop using byte length to compute sizes from strings (to properly dis…

…play non-ASCII characters).

src/ui/command.rs

@@ -41,7 +41,7 @@ pub fn draw(greeter: &mut Greeter, f: &mut Frame) -> Result<(u16, u16), Box<dyn
   f.render_widget(
     command_value,
     Rect::new(
-      1 + chunks[0].x + fl!("new_command").len() as u16,
+      1 + chunks[0].x + fl!("new_command").chars().count() as u16,
       chunks[0].y,
       get_input_width(greeter, width, &Some(fl!("new_command"))),
       1,
@@ -51,5 +51,5 @@ pub fn draw(greeter: &mut Greeter, f: &mut Frame) -> Result<(u16, u16), Box<dyn
   let new_command = greeter.new_command.clone();
   let offset = get_cursor_offset(greeter, new_command.chars().count());
 
-  Ok((2 + cursor.x + fl!("new_command").len() as u16 + offset as u16, cursor.y + 1))
+  Ok((2 + cursor.x + fl!("new_command").chars().count() as u16 + offset as u16, cursor.y + 1))
 }

src/ui/prompt.rs

@@ -75,7 +75,7 @@ pub fn draw(greeter: &mut Greeter, f: &mut Frame) -> Result<(u16, u16), Box<dyn
         f.render_widget(
           username_value,
           Rect::new(
-            1 + chunks[USERNAME_INDEX].x + fl!("username").len() as u16,
+            1 + chunks[USERNAME_INDEX].x + fl!("username").chars().count() as u16,
             chunks[USERNAME_INDEX].y,
             get_input_width(greeter, width, &Some(fl!("username"))),
             1,
@@ -128,7 +128,7 @@ pub fn draw(greeter: &mut Greeter, f: &mut Frame) -> Result<(u16, u16), Box<dyn
       let username_length = greeter.username.chars().count();
       let offset = get_cursor_offset(greeter, username_length);
 
-      Ok((2 + cursor.x + fl!("username").len() as u16 + offset as u16, USERNAME_INDEX as u16 + cursor.y))
+      Ok((2 + cursor.x + fl!("username").chars().count() as u16 + offset as u16, USERNAME_INDEX as u16 + cursor.y))
     }
 
     Mode::Password => {