Make Updater slightly more future proof

- Removes the option to disable update notifications. Users really should not be outdated, so this option was never good. To disable notifications, turn on auto update
- Enables auto update by default. Users keep complaining about issues while being outdated, so this should help
- Update Notification now opens Updater in a modal to remove dependency on Settings patch. This makes it slightly more failsafe, it's unlikely that both modals and our settings patch break

src/components/VencordSettings/settingsStyles.css

@@ -65,3 +65,11 @@
     /* discord also sets cursor: default which prevents the cursor from showing as text */
     cursor: initial;
 }
+
+.vc-updater-modal {
+    padding: 1.5em !important;
+}
+
+.vc-updater-modal-close-button {
+    float: right;
+}