Add filter and icon for map types

[stoecker]

See #16103

The list of imagery in prefs should allow to filter for the types.

If possible the different types should be displayed with a small icon.

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Progress:
Category already added to the following Maps#Listofsources sub pages:

• Maps/Worldwide
• Maps/France
• Maps/Germany
• Alphabetical starting at Maps/Albania down to Maps/Argentina

[Klumbumbus]

And a filter by text please too, (similar to the filterbox for projections), which allows to e.g. filter entries by country (filtertext "de") or city (filtertext "berlin").

[Klumbumbus]

Ticket #16136 has been marked as a duplicate of this ticket.

[Don-vip]

Why 18.08?

[stoecker]

June is too early (first data needs to be added to Maps) and in July I will have no time...

[Klumbumbus]

The wiki doesn't yet allow the category attribute.
Warnung: Ungültige Wiki-Seite: XML validation for map failed: Element '{http://josm.openstreetmap.de/maps-1.0}entry', attribute 'category': The attribute 'category' is not allowed.

[stoecker]

Replying to Klumbumbus:

The wiki doesn't yet allow the category attribute.
Warnung: Ungültige Wiki-Seite: XML validation for map failed: Element '{http://josm.openstreetmap.de/maps-1.0}entry', attribute 'category': The attribute 'category' is not allowed.

Tried
<category>xxx</category>
and it worked fine. Where exactly did you try?

[Klumbumbus]

I tried <entry category="photo"> cause it is listed under attributes at wiki:Maps

[Klumbumbus]

first pages done:

• https://josm.openstreetmap.de/wiki/Maps/Worldwide?action=diff&version=29
• https://josm.openstreetmap.de/wiki/Maps/Germany?sfp_email=&sfph_mail=&action=diff&version=163&old_version=160&sfp_email=&sfph_mail=