[openstreetmap/openstreetmap-website] Local site navigation (#2973)

[Seth Deegan]

**Initial Problem**
Currently, the Query features tool/page has no ability to navigate back to the Query Features list without re-requesting the site/Overpass-API. 

**Example**
![Untitled_ Nov 21, 2020 7_32 PM](https://user-images.githubusercontent.com/22477298/99891575-fecf8f80-2c30-11eb-9d46-eef248cf74f5.gif)

**Explanation**
Here, I query a point and click on an element. Then, I have to use the back-button for my browser to go back to the query list. Of course, this re-requests osm.org and in-turn, Overpass.

**Reasoning & Request**
Sometimes I like to look at and browse a lot of elements (especially in element-dense cities) using the query tool. 
After I look at an element, I want to be able to go back to the link fast, without having to wait for the web page to reload.
A dedicated back button that leads back to the Query page would do this.

**Other Uses**
Other left-pane-using pages on the site could also use this functionality.
For example, after viewing a changed element on a Changeset page, you should be able to easily go back to the Changeset you were viewing without having to use the back button for your browser.

A forward button could also be implemented.

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https://github.com/openstreetmap/openstreetmap-website/issues/2973
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