Paper dialog fired a bad event with a paper-dropdown inside

[florent1933]

Description

If a paper-dropdown is inside a paper-dialog with an event iron-overlay-closed, this event is fired when we are closing the paper-dropdown.

Expected outcome

Closing the paper dropdown should not fire the event.

Live Demo

https://jsbin.com/vugijahohi/edit?html,js,console,output

Steps to reproduce

1. Select a value in the paper-dropdown
2. It fires the bad event

Browsers Affected

• [x] Chrome
• [x] Firefox

I don't know for others

• [ ] Safari 9
• [ ] Safari 8
• [ ] Safari 7
• [ ] Edge
• [ ] IE 11
• [ ] IE 10

Maybe related to : https://github.com/PolymerElements/paper-dialog/issues/132

[nzacca]

Related issue occurs for the iron-overlay-opened event when the paper-dropdown-menu is opened. Using the same demo above, replace the iron-overlay-closed event with iron-overlay-opened. Issue presents itself after clicking on the dropdown within the paper-dialog.