DeepLinking Browser History back

[heckelsa]

When I click on a link (with deeplink to an operation) and try to get back with my browser's back-button, I need to click 3 times instead of one time to get back to the page I was previously.
It's possible to reproduce this behaviour with the petstore example.

Q	A
Bug or feature request?	Bug
Which Swagger/OpenAPI version?	3
Which Swagger-UI version?	Swagger-UI 3.X (http://petstore.swagger.io/#)
How did you install Swagger-UI?	/
Which browser & version?	Firefox 57 and Google Chrome 59
Which operating system?	Ubuntu 16.04

Demonstration API definition

http://petstore.swagger.io/#/pet/getPetById

Expected Behavior

I click on the link to deeplink to an operation. The link opens and jumps to the anchor. If I click one time on the back-button of my browser I expect to get back to the page where I clicked the link previously.

Current Behavior

1. Click on the link with deeplink: As expected it jumps to the operation. The link in the browser address bar is: http://petstore.swagger.io/#/pet/getPetById
2. First click on the back-button of the browser: No change on the page, the link in the browser address bar changes to: http://petstore.swagger.io/#/pet
3. Second click on the back-button of the browser: No change on the page, the link in the browser address bar changes to: http://petstore.swagger.io/#/pet/getPetById
4. Third click on the back-button of the browser: Jumping back to the page where I previously clicked the button.

Context

We have a lot of API's. To help partners find specific operations faster, we made a list of all operations. With clicking on the operation they get to the detail overview. After clicking one time on a link, it's unexpected to have to click three times to return to the previous site.