moved Matöppet, Tempo and Handlar'n from convenience to supermarket

[matthiasfeist]

After re-reading definitions and discussions in the Swedish OSM forum, I decided to move Matöppet, Tempo and Handlar'n to the supermarket category.
Also to distinguish them better from conventional convenience stores like "pressbyrån" or "seven-eleven"

[matthiasfeist]

ping @sp1187 for your information, since you introduced these brands first in #10665

[sp1187]

I guess it's a matter of definition. I set it as convenience based on the suggestion on the OSM wiki that "One suggestion for distinguishing between a supermarket and a convenience shop, is that a supermarket is large enough to use trolleys." (though ICA, Coop and even Hemköp should presumably be split into both based on that definition) and also the fact that Handlar'n and Matöppet explicitly define themselves as "närbutik" on their websites.

Handlar’n är närbutiken på hörnet eller kanske ortens enda butik

Matöppet är närbutikskedjan som alltid sätter kunden först

[matthiasfeist]

yeah I've seen that too. I'm more thinking that there's not really any difference between an ICA nära (which is a supermarket) and any of those other stores. Hence my PR to move them to supermarkets