improve delete confirmation

Make delete confirmations show information in a manner that is easier to
read. This includes delete confirmations for centers, room and folder.

Messages are now more clear. Also, content table shows the type of the
items (folder, room, etc.)

3 files changed, 43 insertions, 35 deletions

diff --git a/ogcp/templates/actions/delete_center.html b/ogcp/templates/actions/delete_center.html
index af89364..5379a58 100644
--- a/ogcp/templates/actions/delete_center.html
+++ b/ogcp/templates/actions/delete_center.html
@@ -9,12 +9,11 @@
 {% block content %}
 
 <h1 class="m-5">{{_('Delete center')}}</h1>
-{% if children %}
-<p class="text-left mx-5">The following items will be deleted</p>
+<p class="text-left mx-5">The following center and its content will be deleted</p>
 <table class="table table-hover mx-5">
 <thead class="thead-light">
 <tr>
-<th>
+<th colspan="2">
 {% for x in ancestors %}
     {{x}}
     {% if not loop.last %}
@@ -25,19 +24,22 @@
 </tr>
 </thead>
 <tbody class="text-left">
-{% for c in children %}
-    <tr>
-        <td>
-            {% if c['type'] == 'folder' %}
-            &#x1F4C1;
-            {% endif %}
-            {{c['name']}}
-        </td>
-    </tr>
-{% endfor %}
+{% if children %}
+    {% for type, elements in children.items() %}
+        <tr>
+            <th>{{ type }}</th>
+            <td>
+            {% for e in elements %}
+                {{e}}
+            {% endfor %}
+            </td>
+        </tr>
+    {% endfor %}
+{% else %}
+    <tr><td>This center is empty</td></tr>
+{% endif %}
 </tbody>
 </table>
-{% endif %}
 
 {{ wtf.quick_form(form,
                   action=url_for('action_center_delete'),
diff --git a/ogcp/templates/actions/delete_room.html b/ogcp/templates/actions/delete_room.html
index 3fa24cf..b4c3601 100644
--- a/ogcp/templates/actions/delete_room.html
+++ b/ogcp/templates/actions/delete_room.html
@@ -11,11 +11,11 @@
 <h1 class="m-5">{{_('Delete room')}}</h1>
 
 {% if children %}
-<p class="text-left mx-5">The following items will be deleted</p>
+<p class="text-left mx-5">The following room and its content will be deleted</p>
 <table class="table table-hover mx-5">
 <thead class="thead-light">
 <tr>
-<th>
+<th colspan="2">
 {% for x in ancestors %}
     {{x}}
     {% if not loop.last %}
@@ -26,16 +26,20 @@
 </tr>
 </thead>
 <tbody class="text-left">
-{% for c in children %}
+{% if children %}
+{% for type, elements in children.items() %}
     <tr>
+        <th>{{ type }}</th>
         <td>
-            {% if c['type'] == 'folder' %}
-            &#x1F4C1;
-            {% endif %}
-            {{c['name']}}
+        {% for e in elements %}
+            {{e}}
+        {% endfor %}
         </td>
     </tr>
 {% endfor %}
+{% else %}
+    <tr><td>This room is empty</td></tr>
+{% endif %}
 </tbody>
 </table>
 {% endif %}
diff --git a/ogcp/templates/actions/folder_delete.html b/ogcp/templates/actions/folder_delete.html
index 8d497e8..0f58026 100644
--- a/ogcp/templates/actions/folder_delete.html
+++ b/ogcp/templates/actions/folder_delete.html
@@ -10,12 +10,11 @@
 
 <h1 class="m-5">{{_('Delete folder')}}</h1>
 
-{% if children %}
-<p class="text-left mx-5">The following items will be deleted</p>
+<p class="text-left mx-5">The following folder and its content will be deleted</p>
 <table class="table table-hover mx-5">
 <thead class="thead-light">
 <tr>
-<th>
+<th colspan="2">
 {% for x in ancestors %}
     {{x}}
     {% if not loop.last %}
@@ -26,19 +25,22 @@
 </tr>
 </thead>
 <tbody class="text-left">
-{% for c in children %}
-    <tr>
-        <td>
-            {% if c['type'] == 'folder' %}
-            &#x1F4C1;
-            {% endif %}
-            {{c['name']}}
-        </td>
-    </tr>
-{% endfor %}
+{% if children %}
+    {% for type, elements in children.items() %}
+        <tr>
+            <th>{{ type }}</th>
+            <td>
+            {% for e in elements %}
+                {{e}}
+            {% endfor %}
+            </td>
+        </tr>
+    {% endfor %}
+{% else %}
+    <tr><td>This folder is empty</td></tr>
+{% endif %}
 </tbody>
 </table>
-{% endif %}
 
 {{ wtf.quick_form(form,
                   method='post',