add name=* field to the preset for highway=traffic_signals

[sommerluk]

In Japan, traffic signals have official names. These names serve for orientation in the local area and are even more important on a map than street names.

As far as I know, Japan is the only country with named traffic signals (though I’m not 100% sure):

​osmwiki:Tag:highway%3Dtraffic_signals#Named_traffic_signals.2Ftraffic_signal_systems_.28Japan.E2.80.A6.29

A Japanese specific preset could be an option. But maybe we could also just add name=* to the existing preset for highway=traffic_signals – as very last element?

[Don-vip]

We already have country-specific optional tags (mainly in addr:* preset), so it's perfectly fine to add an optional name attribute to the existing preset.