update previously joined meetings on root page

app/assets/javascripts/previous_meetings.coffee

@@ -0,0 +1,15 @@
+class @PreviousMeetings
+  @init: (type)->
+    $('.center-panel-wrapper').on 'click', '.fill-meeting-name', (event, msg) ->
+      name = $(this).text()
+      $('input.meeting-name').val(name).trigger('input')
+
+    $('ul.previously-joined').empty()
+    joinedMeetings = localStorage.getItem(type)
+    if joinedMeetings && joinedMeetings.length > 0
+      joinedMeetings = joinedMeetings.split(',')
+
+      for m in joinedMeetings by -1
+        $('ul.previously-joined').append('<li><a class="fill-meeting-name">'+m+'</a></li>')
+
+      $('.center-panel-wrapper .previously-joined-wrapper').removeClass('hidden')