Update PostModifyForm to use permissions to create its fields

Fields are only displayed via the PostModifyForm if the user has
specific permissions to do things, like set stickies.

Also, add PostModifySuccessView that will close the modify window when
the process is complete.

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

board/templates/board/base.html

@@ -12,8 +12,11 @@
         <script src="{% static 'board/jquery.js' %}"></script>
         <script src="{% static 'board/jsframe.min.js' %}"></script>
         <script src="{% static 'board/post.js' %}"></script>
-        {% if perms.board.create_ban %}
-            <script src="{% static 'board/ban_window.js' %}"></script>
+        {% if perms.board.add_ban %}
+            <script src="{% static 'board/ban.js' %}"></script>
+        {% endif %}
+        {% if can_modify %}
+            <script src="{% static 'board/modify.js' %}"></script>
         {% endif %}
         {% block extrajs %}{% endblock %}
     </head>

board/templates/board/post_modify_success.html

@@ -0,0 +1,33 @@
+{% extends "board/base.html" %}
+{% load i18n static %}
+{# Title #}
+{% block title %}{% translate "Post modify success" %}{% endblock %}
+{# Body #}
+{% block content %}
+<div class="row" id="message">
+    {# We do not use pluralize filter for "seconds" because it's a pain to get it to translate. #}
+    {% blocktranslate %}Post has been modified. This window will close in {{window_timeout}} second(s).{% endblocktranslate %}
+</div>
+
+<script>
+function isIframe() {
+    try {
+        return window.self !== window.top;
+    } catch (_) {
+        return true;
+    }
+}
+
+setTimeout(function() {
+    if(isIframe()) {
+        let modifyWindow = getModifyWindow();
+        if(modifyWindow) {
+            modifyWindow.closeFrame();
+        }
+    } else {
+        window.close();
+    }
+}, 1000 * {{window_timeout}});
+
+</script>
+{% endblock %}

board/templates/board/post_modify_view.html

@@ -5,7 +5,7 @@
 <form method="post" action="{% url 'board:post_modify' post.id %}">
     {% csrf_token %}
     <table>
-    {% if perms.board.can_sticky %}
+    {% if perms.board.set_sticky %}
     <tr>
         <th>{{form.sticky.label_tag}}</th>
         <td>{{form.sticky}}</td>

board/templates/board/post_snippet.html

@@ -3,10 +3,10 @@
 <div
     id="p{{post.id}}"
     data-report-url="{% url 'board:report_form' board.url post.id %}"
-    {% if perms.board.create_ban %}
+    {% if perms.board.add_ban %}
     data-ban-url="{% url 'board:ban_create' board.url post.id %}"
     {% endif %}
-    {% if perms.board.can_sticky %}
+    {% if can_modify %}
     data-modify-url="{% url 'board:post_modify' post.id %}"
     {% endif %}
     >