Set all delete buttons as bootstrap buttons.

cicm_web/Areas/Admin/Views/BrowserTests/Delete.cshtml

@@ -139,10 +139,16 @@
             @Html.DisplayFor(model => model.Flash)
         </dd>
     </dl>
-    
+
     <form asp-action="Delete">
-        <input type="hidden" asp-for="Id" />
-        <input type="submit" value="Delete" class="btn btn-default" /> |
-        <a asp-action="Index">Back to List</a>
+        <input type="hidden"
+               asp-for="Id" />
+        <input class="btn btn-danger"
+               type="submit"
+               value="Delete" />
+        <a asp-action="Index"
+           class="btn btn-secondary">
+            Back to List
+        </a>
     </form>
-</div>
+</div>