Improvements for natural=tree

[PanderMusubi]

Here are some improvements for natural=tree, see also https://github.com/simonpoole/beautified-JOSM-preset/blob/master/master_preset.xml#L10388

The key taxon is used rarely, species is the most important. Genus can be derived from species but is good to have in there, nevertheless. See also https://wiki.openstreetmap.org/wiki/Key:taxon

The keys type and cycle are no longer to be used for a tree, so these need to be removed as well. See also https://wiki.openstreetmap.org/wiki/Key:type and there is no wiki page for key cycle. Instead of these leaf_type and leaf_cycle need to be offered. See also https://wiki.openstreetmap.org/wiki/Key:leaf_type and https://wiki.openstreetmap.org/wiki/Key:leaf_cycle (Note that mixes for natural=tree should never be chosen. That is for forests etc.)

To be added, as it can be measured relatively easy by surveyors, is circumference. See also https://wiki.openstreetmap.org/wiki/Key:circumference

See also the following screenshots. What is a property and what is a detail is for me for trees prety much the same. Keys genus, leaf_type and leaf_ cycle can be derived from species, so those are to me details. A tree does often not have a proper name so that is for me a detail too. When it has a name, it usually also has an organisation taking care of it, so the key operator is also good to offer with name under details only.