make favorite view more mobile friendly

append buttons under each row of data instead besides
append a line which separates the tables beneath every odd line to group data and buttons

app/views/favorites/courses.html.erb

@@ -8,8 +8,6 @@
       <tr>
         <th><%= sortable "Title", "title" %></th>
         <th><%= sortable "Registration Date", "created_at" %></th>
-        <th></th>
-        <th></th>
       </tr>
       <% for course in @favorite_courses %>
         <tr>
@@ -19,6 +17,8 @@
           <td>
             <%= course['created_at'] %>
           </td>
+        </tr>
+        <tr>
           <td>
             <%= button_to 'Details', crawlers_courses_crawler_show_detail_url(:number => course['number'], :semester => course['semester']) %>
           </td>

app/views/favorites/people.html.erb

@@ -32,8 +32,6 @@
         <th><%= sortable "First Name", "first_name" %></th>
         <th><%= sortable "Last Name", "last_name" %></th>
         <th><%= sortable "Registration Date", "created_at" %></th>
-<!--        <th></th>-->
-<!--        <th></th>-->
       </tr>
       <% for person in @favorite_people %>
         <tr>

app/views/favorites/projects.html.erb

@@ -8,8 +8,6 @@
       <tr>
         <th><%= sortable "Title", "title" %></th>
         <th><%= sortable "Registration Date", "created_at" %></th>
-        <th></th>
-        <th></th>
       </tr>
       <% for project in @favorite_projects %>
         <tr>
@@ -19,6 +17,8 @@
           <td>
             <%= project['created_at'] %>
           </td>
+        </tr>
+        <tr>
           <td>
             <%= button_to 'Details', crawlers_projects_crawler_show_detail_url(:id => project['id']) %>
           </td>