transform gui icons to svg

[Klumbumbus]

Since we have an icon scaling on hidpi screens now (ticket:9995#comment:110) it would be nice to transform all icons to svg. Preset icons are already all svg (#13357)

Here are the current numbers: 60 svg icons and 270 png icons. This statistic excludes the folders images/presets, images/icons (only potlatch icons), our logo (which exists as png versions additionally to svg) and two secial cases.

svg:

png:

I think we could ask the osm community for help on this subject.

There are two possibilities:

• transform the 270 png to svg
• create a whole new icon set with an consistent look

For the second, there was already such an (not fully complete) dataset, see JOSM themes. Sadly the links and screenshoots in the forum are no longer available. Maybe we could recover them. 1 or 2 years ago I tried these themes and they looked pretty nice. If we could use this as base there would be less than 270 to be transformed.