Add confirm loop

For pages where
- we want you to be sure that you want to do what you’re about to do
- we want to be sure it’s you trying to do the thing

This adds a page that asks the user to confirm their password.

app/templates/components/textbox.html

@@ -1,8 +1,8 @@
-{% macro textbox(name, label, value='', small=True, highlight_tags=False) %}
+{% macro textbox(name, label, value='', small=True, highlight_tags=False, password=False) %}
   <div class="form-group">
     <label class="form-label" for="{{ name }}">{{ label }}</label>
     {% if small %}
-      <input class="form-control" id="{{ name }}" name="{{ name }}" type="text" value="{{ value }}">
+      <input class="form-control" id="{{ name }}" name="{{ name }}" type="{{ 'password' if password else 'text' }}" value="{{ value }}">
     {% else %}
       <textarea
         class="form-control {% if highlight_tags %}textbox-highlight-textbox{% endif %}"