fix #9155 - map style icon resizing tries to make zero height icons sometimes

git-svn-id: http://josm.openstreetmap.de/svn/trunk@6290 0c6e7542-c601-0410-84e7-c038aed88b3b
fix #9152 - Map style forced icon resizing made style unusable

git-svn-id: http://josm.openstreetmap.de/svn/trunk@6291 0c6e7542-c601-0410-84e7-c038aed88b3b
fix #9150 - NPE in GeoImageLayer.extractExif()

git-svn-id: http://josm.openstreetmap.de/svn/trunk@6292 0c6e7542-c601-0410-84e7-c038aed88b3b
fix #9138, fix #9147, fix #9149 - presets update:
* add `collection_times` to `amenity=post_box` preset (patch by skyper)
* wiki links for `shop=stationery` preset (patch by skyper)
* add `building=shed` to Building preset

git-svn-id: http://josm.openstreetmap.de/svn/trunk@6293 0c6e7542-c601-0410-84e7-c038aed88b3b