officejs_support_request_ui: fix style for <p> in comment list

The vertial space between two <p> was not different from the vertical
space between two lines in a <p> making it hard to visualize the
boundaries of paragraphs.

bt5/erp5_officejs_support_request_ui/PathTemplateItem/web_page_module/gadget_supportrequest_pt_form_view_discussable_css.css

@@ -20,4 +20,9 @@ hr#post_item {
 #post_list li ul {
   list-style: initial;
   padding-left: 2em;
-}
+}
\ No newline at end of file
+
+#post_list li p {
+  margin-block-start: 1em;
+  margin-block-end: 1em;
+}

bt5/erp5_officejs_support_request_ui/PathTemplateItem/web_page_module/gadget_supportrequest_pt_form_view_discussable_css.xml

@@ -260,7 +260,7 @@
                     </tuple>
                     <state>
                       <tuple>
-                        <float>1542106546.26</float>
+                        <float>1542360993.57</float>
                         <string>GMT+9</string>
                       </tuple>
                     </state>