Location aware search

Closes #3400 #14217

Introduces suggestion grouping on the search box and adds the ability to the user to remove the location to search on.


**Notes**
- Suggestions are now grouped by category.
- Suggestions are displayed when no location is set.
  - Would be great to provide suggestions for the specified location which could be a project or group.
- A location is set from the server for projects/groups related urls.

**Default Apparence**

![](/uploads/9fad1a354fb0e4b13cfd36698c061ab4/default.gif)

**When location badge is present**

![](/uploads/ddc6379f407061e188f9f4a7a9a8c9b8/location-badge.gif)

**Suggestions**

![suggestions](/uploads/2df288e00ad496b31a1a2efc2a4a9f6d/suggestions.gif)

**Suggestions when location badge is present**

![](/uploads/f6ef09d3aed124179ab4e228b848486e/location-present-suggestions.gif)

Closes #3400 

See merge request !3212