feat(i18n): sort en.yml and fix typos

Alphabetized keys for better maintainability.

Fixed spelling errors in customer and vehicle keys/values.

Corrected "QuickBooks Online" branding.

app/views/vehicles/index.html.erb

@@ -1,4 +1,4 @@
-<h2><%=t(:label_cusomer_vehicles)%> <span style="float:right"> <%= render partial: 'vehicles/search' %> </span> </h2> 
+<h2><%=t(:label_customer_vehicles)%> <span style="float:right"> <%= render partial: 'vehicles/search' %> </span> </h2> 
 <br/> 
 
 <%= render partial: 'vehicles/list', locals: {vehicles: @vehicles} %>