* Otherwise is_maximized always returns `true`
Release Notes:
- Fixed maximized state. Tested with a dummy maximize/restore button
with the `zoom()` (not implemented yet). Without the right `maximized`,
in toggle zoom function is not possible to call `set_maximized()` or
`unset_maximized()`.
```rust
fn zoom(&self) {
if self.is_maximized() {
self.borrow_mut().toplevel.unset_maximized();
} else {
self.borrow_mut().toplevel.set_maximized();
}
}
```
