add print button to all detail views

app/views/crawlers/projects_crawler/show_detail.html.erb

@@ -1,5 +1,7 @@
 <% if @project != nil %>
   <h2>Project: <%= @project['titleDe'] %></h2>
+  <%= button_to "PRINT", '#', onclick: "print()" %>
+
   <h5><%= @project['contractBegin'] %> - <%= @project['contractEnd'] %></h5>
   <%= button_to 'Add to favorites', action: :add_to_fav, id: @id, title: @project['titleDe'] %>
   <% if @project['abstractDe'] != nil %>