Add size to columns on budget tables

app/views/cost_objects/_show_variable_cost_object.html.erb

@@ -20,7 +20,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
 <h3><%= l(:caption_materials) %></h3>
 <div class="grid-block">
-  <div class="grid-content">
+  <div class="grid-content medium-6">
     <h4><%= VariableCostObject.human_attribute_name(:material_budget) %></h4>
     <div>
       <div class="generic-table--container -with-footer">
@@ -100,7 +100,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
       </div>
     </div>
   </div>
-  <div class="grid-content">
+  <div class="grid-content medium-6">
     <h4><%= l(:caption_material_costs) %></h4>
     <div>
       <div class="generic-table--container -with-footer">
@@ -197,7 +197,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
 <h3><%= l(:caption_labor) %></h3>
 <div class="grid-block">
-  <div class="grid-content">
+  <div class="grid-content medium-6">
     <h4><%= VariableCostObject.human_attribute_name(:labor_budget)%></h4>
     <div>
       <div class="generic-table--container -with-footer">
@@ -283,7 +283,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
       </div>
     </div>
   </div>
-  <div class="grid-content">
+  <div class="grid-content medium-6">
     <h4><%= l(:caption_labor_costs) %></h4>
     <div>
       <div class="generic-table--container -with-footer">