Update tree icons

[tordans]

The new tree presets from #956 are great to get more detailed trees on the map a lot easier.

However, especially the unspecified tree icon can be improved. @bhousel created a new set of icons in https://github.com/rapideditor/temaki/issues/87 which this PR applies. (Temaki release 5.6.)

Preview of icons: https://rapideditor.github.io/temaki/docs/ => "tree"

Let's see how they look on the map in the preview…

Todos:

• [x] The icons don't show. ==> This requires https://github.com/openstreetmap/iD/pull/9953
• [x] The drop-down icons need Toben updated as well ==> Done

[github-actions[bot]]

:bento: Preview the tagging presets of this pull request here: https://pr-1035--ideditor-presets-preview.netlify.app/id/dist/#locale=en.