fixes some ui texts

tracim/tracim/templates/home.mak

                             <div class="t-half-spacer-above">
                                 <div class="panel panel-success">
                                     <div class="panel-heading">
-                                        <h3 class="panel-title"><i class="fa fa-fw fa-eye-slash"></i> ${_('Unread')}</h3>
+                                        <h3 class="panel-title"><i class="fa fa-fw fa-eye-slash"></i> ${_('Not Read')}</h3>
                                     </div>
                                     <div class="panel-body">
                                         % if fake_api.last_unread.nb <= 0:
-                                            ${P.EMPTY_CONTENT(_('No unread content.'))}
+                                            ${P.EMPTY_CONTENT(_('No new content.'))}
                                         % else:
                                             <table class="table table-hover">
                                                 % for item in fake_api.last_unread.contents:
                         <div class="col-sm-12">
                             <div class="panel panel-info">
                                 <div class="panel-heading">
-                                    <h3 class="panel-title"><i class="fa fa-bank"></i> ${_('Your workspaces')}</h3>
+                                    <h3 class="panel-title"><i class="fa fa-bank"></i> ${_('Workspaces')}</h3>
                                 </div>
                                 <div class="panel-body">
 

tracim/tracim/templates/user_toolbars.mak

                 user_edit_url = tg.url('/user/{}/edit'.format(current_user.id), {'next_url': '/home'})
                 user_password_edit_url = tg.url('/user/{}/password/edit'.format(current_user.id))
             %>
-            <a title="${_('Unread')}" class="btn btn-default" href="#unread-content-panel" >${ICON.FA('fa-fw fa-eye-slash t-less-visible')} ${_('Unread')}</a>
+            <a title="${_('Not read')}" class="btn btn-default" href="#unread-content-panel" >${ICON.FA('fa-fw fa-eye-slash t-less-visible')} ${_('Not Read')}</a>
             <a title="${_('Recent Activity')}" class="btn btn-default" href="#recent-activity-panel" >${ICON.FA('fa-fw fa-line-chart t-less-visible')} ${_('Activity')}</a>
             <a title="${_('My Workspaces')}" class="btn btn-default" href="#workspaces-panel" >${ICON.FA('fa-fw fa-bank t-less-visible')} ${_('Spaces')}</a>
         </div>