Tooltip for All Icon-only Control Buttons

[BAByrne]

Motivation

Zoom in/out and bearing buttons have descriptions that display on hover. Icon-only control buttons (e.g. Geolocation) can be ambiguous to casual users of interactive maps.

Design Alternatives

Add a custom tooltip or title attribute to all icon-only core control buttons.

Design

A title attribute: solves the problem; adds to accessibility; is supported by all modern browsers; requires minimal changes to the codebase

Mock-Up

N/A

Concepts

The geolocator's tooltip should be descriptive. Maybe something like, "Find my location".

Implementation

Should be implemented the same way the other button titles are implemented.