fix(settings): switch custom styles to bootstrap class for bottom margin

src/pages/Settings.vue

@@ -144,10 +144,10 @@
                             <h2 class="mt-5 mb-2">{{ $t("Advanced") }}</h2>
 
                             <div class="mb-3">
-                                <button v-if="settings.disableAuth" class="btn btn-outline-primary me-1" @click="enableAuth">{{ $t("Enable Auth") }}</button>
-                                <button v-if="! settings.disableAuth" class="btn btn-primary me-1" @click="confirmDisableAuth">{{ $t("Disable Auth") }}</button>
-                                <button v-if="! settings.disableAuth" class="btn btn-danger me-1" @click="$root.logout">{{ $t("Logout") }}</button>
-                                <button class="btn btn-outline-danger me-1" @click="confirmClearStatistics">{{ $t("Clear all statistics") }}</button>
+                                <button v-if="settings.disableAuth" class="btn btn-outline-primary me-1 mb-1" @click="enableAuth">{{ $t("Enable Auth") }}</button>
+                                <button v-if="! settings.disableAuth" class="btn btn-primary me-1 mb-1" @click="confirmDisableAuth">{{ $t("Disable Auth") }}</button>
+                                <button v-if="! settings.disableAuth" class="btn btn-danger me-1 mb-1" @click="$root.logout">{{ $t("Logout") }}</button>
+                                <button class="btn btn-outline-danger me-1 mb-1" @click="confirmClearStatistics">{{ $t("Clear all statistics") }}</button>
                             </div>
                         </template>
                     </div>
@@ -446,10 +446,6 @@ export default {
     color: #fff;
 }
 
-.me-1 {
-    margin-bottom: .25rem;
-}
-
 .dark {
     .list-group-item {
         background-color: $dark-bg2;