web/docs: Add table for invite response icons

web/docs.html

@@ -343,15 +343,18 @@ <h4 id="invt">4a. Invitations</h4>
 and its type: 
 </p>
 
-<div style="margin: 0 2em; float:left">
-   <span uk-icon="rss"></span> for an invite, <br>
-   <span uk-icon="mail"></span> (a hyperlink) for a thread, <br>
-   <span uk-icon="reply"></span> when this invite is a response,
-</div><div>
-   <span uk-icon="check"></span> for an accepted group invitation, <br>
-   <span uk-icon="plus-circle"></span> if the recipient joined the group. <br>
-   &nbsp;
-</div> 
+<table style="margin-left:1em; border-spacing:0.5em 0">
+<tr><td class="btn-alignt"><span uk-icon="rss"></span></td>
+    <td> response via invite </td></tr>
+<tr><td class="btn-alignt"><a onclick="return false"><span uk-icon="mail"></span></a></td>
+    <td> response via thread </td></tr>
+<tr><td class="btn-alignt"><span uk-icon="reply"></span></td>
+    <td> this invite is a response or followup </td></tr>
+<tr><td class="btn-alignt"><span uk-icon="check"></span></td>
+    <td> group invitation accepted </td></tr>
+<tr><td class="btn-alignt"><span uk-icon="plus-circle"></span></td>
+    <td> recipient joined the group </td></tr>
+</table> 
 
 <p>To view the thread &amp; message that delivered an invite response, 
 click the <span uk-icon="mail"></span> hyperlink, 

web/gui.vue

@@ -2142,7 +2142,7 @@
                title="Responded by invite"
                uk-icon="rss"></span>
          <span v-else
-               title="Invite is a reply"
+               title="Invite is a reply/followup"
                uk-icon="reply"></span>
          <mnm-date v-if="ping.Response.Date"
                    :iso="ping.Response.Date" ymd="md"/>