Small changes

src/repetition.rs

@@ -149,7 +149,7 @@ impl RepetitionState {
 
     fn draw_backward(&self) -> Element<'_, RepetitionMessage> {
         if !self.open {
-            return space().into();
+            return container(text!("?").size(72)).width(Fill).height(Fill).align_y(alignment::Vertical::Center).align_x(Center).into();
         }
 
         self.draw_card_view(self.settings.backward.as_str())
@@ -209,7 +209,7 @@ impl RepetitionState {
                     tooltip::Position::Top
                 ),
             ]
-            .spacing(DEFAULT_SPACING / 4.0)
+            .spacing(QUARTER_SPACING)
         ]
         .align_x(Center)
         .spacing(DEFAULT_SPACING)