Restructure sports_centre preset by sport type

[gaben]

What steps will reproduce the problem?

A sports_centre has multiple sports. What do you do?

1. select the first sport from the preset's dropdown list
2. the rest needed to type by hand
3. don't forget the semicolon

What is the expected result?

The sport input should be intuitive. I propose to change the preset structure to represent sport types by the classification, for example, athletics, ball, table etc. and replace dropdown with tickboxes. In this case, they can easily be recognised and added if there are more.

This wiki page is a good starting point ​https://en.wikipedia.org/wiki/List_of_sports

What happens instead?

Currently with only a single dropdown, adding a sport is 'hard' and slow for sure.

Please provide any additional information below. Attach a screenshot if possible.

URL:https://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2020-10-17 00:52:48 +0200 (Sat, 17 Oct 2020)
Build-Date:2020-10-17 01:30:59
Revision:17218
Relative:URL: ^/trunk

[gaben]

What do you think?