Fix sidebar styling

app/components/Sidebar.js

@@ -70,7 +70,7 @@ const Sidebar = (props) => {
             backgroundColor={colors.white}
             color={props.currentScene === button.scene ?
                  colors.magenta : colors.textColour}
-            size={28}
+            size={24}
             iconStyle={styles.buttonIcon}
             style={[styles.buttonText, button.style]}
             key={button.scene}

app/components/style/sidebar.js

@@ -45,7 +45,7 @@ const styles = StyleSheet.create({
     textAlign: 'center',
   },
   buttonText: {
-    padding: 20,
+    padding: 16,
   },
 });