Bootstrap migration fixups (#2534)

* Remove xxl breakpoint

* Remove code bg

* Form updates

* Update PoS accordion

* Update forms

* Fix webhook password toggle

* Update highlight js styles

* Page updates

* Style unformatted checkboxes

* Fix typo

* Update accordions

* Update policies domain mapping

* Update toggles and checkboxes

* Update storage pages

* Fix specter logo filename casing

* Update checkout experience view

* Update webhook view

* Re-add used negative margins

* Update bootstrap

* POS layout fixes

* Decrease size of info icon in main headline

* Update BTCPayServer/Views/Stores/ModifyWebhook.cshtml

Co-authored-by: britttttk <39231115+britttttk@users.noreply.github.com>

Co-authored-by: britttttk <39231115+britttttk@users.noreply.github.com>

BTCPayServer/Views/Server/EditFileSystemStorageProvider.cshtml

@@ -0,0 +1,17 @@
+@model BTCPayServer.Storage.Services.Providers.FileSystemStorage.Configuration.FileSystemStorageConfiguration
+@{
+    ViewData.SetActivePageAndTitle(ServerNavPages.Services, $"Local Filesystem Storage");
+}
+
+<h2 class="mb-4">@ViewData["PageTitle"]</h2>
+
+<p>Any uploaded files are being saved on the same machine that hosts BTCPay; please pay attention to your storage space.</p>
+<div class="row">
+    <div class="col-lg-6">
+        <a asp-action="Storage" asp-route-forceChoice="true">Change Storage provider</a>
+    </div>
+</div>
+
+@section PageFootContent {
+    <partial name="_ValidationScriptsPartial" />
+}