Participation panel revamp and fixes

Apollo is a pain in the ass with pagination & filters, so this removes
the tabs system and uses a <select> to filter instead

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

js/public/index.html

@@ -6,8 +6,6 @@
   <meta http-equiv="X-UA-Compatible" content="IE=edge" />
   <meta name="viewport" content="width=device-width,initial-scale=1.0" />
   <link rel="icon" href="<%= BASE_URL %>favicon.ico" />
-  <!-- <title><%= htmlWebpackPlugin.options.title %></title> -->
-  <!-- <%= VUE_APP_INJECT_COMMENT %> -->
   <meta name="server-injected-data" />
 </head>