Add close button and remove import from sidebar.slint

Author: malfisya

ui/main.slint

@@ -6,7 +6,6 @@ import { StandardButton, VerticalBox, Button, HorizontalBox, Spinner, StyleMetri
 import { Images } from "components/images.slint";
 import { LiveISO } from "pages/liveiso.slint";
 import { Callbacks } from "components/callbacks.slint";
-import { SideBar} from "components/sidebar.slint";
 import { FirstStart } from "pages/firststart.slint";
 import { Donation } from "pages/donation.slint";
 

ui/pages/firststart.slint

@@ -224,9 +224,17 @@ export component FirstStart {
             }
         }
 
-        CheckBox {
-            text: "Launch on Startup";
-            checked: true;
+        HorizontalBox {
+            CheckBox {
+                text: "Launch on Startup";
+                checked: true;
+            }
+
+            StandardButton {
+                kind: close;
+                height: 48px;
+                width: 200px;
+            }
         }
     }
 }