Add ability to select multiple activity type groupings in personal heatmap

[andrewgilbert12]

In the web heatmap, you can filter the global/personal heatmaps by either a specific sport, or by "all sports." It would be useful to be able to select multiple, but not all, sports. For example, I often want to look at my personal heatmap for both runs and walks, but excluding cycling activities.

This feature used to exist before the most recent updates, and it appears that it still exists on mobile.

Similarly, it would be useful to have these same filter options in the route creation map.

[Jane]

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[marm8]

As a walking person, I want to see all the walkable routes in my zone, so that I can choose one depending on other attributes, like length, passing points, etc.

Also, I don't think I understand the difference between "walk" and "hike", it's probably a little subjective as well. I personally would walk perfectly an hiking route and a run trail as well.

Actually I think sometimes I'm also willing to walk cycling routes.

So, basically as a walking person, I would like to multiselect the kind of routes I want to see, to get a better overview of the options available

I'd li