add a png for the presentation text button.

product/ERP5/bootstrap/erp5_xhtml_style/SkinTemplateItem/portal_skins/erp5_xhtml_style/images/text.png.xml

+<?xml version="1.0"?>
+<ZopeData>
+  <record id="1" aka="AAAAAAAAAAE=">
+    <pickle>
+      <global name="Image" module="OFS.Image"/>
+    </pickle>
+    <pickle>
+      <dictionary>
+        <item>
+            <key> <string>_Cacheable__manager_id</string> </key>
+            <value> <string>http_cache</string> </value>
+        </item>
+        <item>
+            <key> <string>_EtagSupport__etag</string> </key>
+            <value> <string>ts65602636.96</string> </value>
+        </item>
+        <item>
+            <key> <string>__name__</string> </key>
+            <value> <string>text.png</string> </value>
+        </item>
+        <item>
+            <key> <string>content_type</string> </key>
+            <value> <string>image/png</string> </value>
+        </item>
+        <item>
+            <key> <string>data</string> </key>
+            <value> <string encoding="base64">iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAABOUlEQVR4XpWSsaqDQBREr5Iqvfkc
+G0vRsI0pAso2gmksxK8IKWy0SCAYMH1+wNJvMQmkVxd8by+sGMXlvYHLgNw5zq4qfd/D7XZLASAA
+uTLXdQ8wEQKu12vveZ40nec5QiilXxCVG2MMA+/3G16vF87z+YS6rnG4LMvie8H5fE5ngK7rEKAo
+yteoqorO1bYtEEL4bpD+SgBWU0BVVTCVbdvDjuM4UBRFkCQJhGF4wDs4Ho99FEXw+XwwwJ8J56Np
+2gx6Op0gjmNlJeqJBmVZYmhJuq7DZrMZMghommYAGIYhAIs+zowb4KU9Hg9pA9M00RcbbLfbpbfL
+GwjA/X4fBefa7XbyBvv9XgAkjpnZf4C6XC4gE6UURpn5EXzfF/UlDSZHYIzhF1iv1/AH8V3MjAEZ
+ISSA/ynj9gNx+uMEce180wAAAABJRU5ErkJggg==</string> </value>
+        </item>
+        <item>
+            <key> <string>height</string> </key>
+            <value> <int>16</int> </value>
+        </item>
+        <item>
+            <key> <string>precondition</string> </key>
+            <value> <string></string> </value>
+        </item>
+        <item>
+            <key> <string>size</string> </key>
+            <value> <int>370</int> </value>
+        </item>
+        <item>
+            <key> <string>title</string> </key>
+            <value> <string></string> </value>
+        </item>
+        <item>
+            <key> <string>width</string> </key>
+            <value> <int>16</int> </value>
+        </item>
+      </dictionary>
+    </pickle>
+  </record>
+</ZopeData>