On the applications plan page the default plan drop down selector saves on change. Since this change can have a major impact this change should require a confirmation. It's too easy to inadvertently make a change without realizing it.

To reproduce: 

• Go to http://provider-admin.lvh.me:3000/apiconfig/services/2/application_plans
• Confirm the change button is disabled
• Change the default application plan and check if confirmation notice is received
• Confirm the change button is disabled
• Change the plan on select, confirm change button is available
• Go back to previous plan and confirm change button is disabled