Issue #297 Buttons layout changes

tutor/app/views/problems/_failure_options.html.erb

@@ -1 +1,2 @@
-<%= button_to 'Save as Incomplete', track_path(:id => @problem.track_id), method: :get %>
+<%= button_to 'Save as Incomplete', track_path(:id => @problem.track_id), method: :get,
+	class: 'btn btn-primary' %>

tutor/app/views/problems/_success_options.html.erb

@@ -1 +1,2 @@
-<%= button_to ' Save as complete   ', problem_done_path(:problem_id => @problem.id), method: :get %>
+<%= button_to ' Save as complete   ', problem_done_path(:problem_id => @problem.id), method: :get,
+	class: 'btn btn-primary' %>

tutor/app/views/problems/edit.html.erb

@@ -44,14 +44,10 @@
 <br>
 <br>
 <%= render partial: "problems/success_options" %>
-<!-- A division for the flash message output to view the action's output -->
-<% if flash[:notice] %>
-	<div class="notice"><%= flash[:notice] %></div>
-<% end %>
-    <%= button_to "Delete Problem", {:action => 'destroy'}, method: :delete,
-		class: 'btn btn-primary', :id => params[:id],
-			:confirm => "Are you sure you want to delete this problem ??" %>
-
+<%= button_to "Delete Problem", {:action => 'destroy'}, method: :delete,
+	class: 'btn btn-primary', :id => params[:id],
+	:confirm => "Are you sure you want to delete this problem ??" %>
 <% if @problem.model_answers.empty? || @problem.test_cases.empty? %>
 	<%= render partial: "problems/failure_options" %>
 <% end %>
+<br>