[PATCH] Show photo direction arrow for thumbnail

[holgermappt]

This patch adds the image direction arrow to thumbnails. Plus some usability enhancements.

Detailed changes:

• The image direction arrow is now shown for photo icons and thumbnails (was for icons only before). It scales with the size if the icon or thumbnail. The arrow is now slightly transparent with a black border (was solid white before). File GeoImageLayer.java
• The speed is read from the EXIF GPS data (was not read before). File GeoImageLayer.java
• An update of the image display on-screen display (OSD) triggers a repaint. This is needed if one the OSD values changes to reflect the change. File ImageDisplay.java
• Comment of speed was changed to kilometer per hour. Was kilometer per second before, but GPX correlation and OSD uses km/h. File ImageEntry.java
• The word Speed was added to the OSD to use the same format as the other values. File ImageViewerDialog.java

[holgermappt]

Patch file for this ticket

[bastiK]

In 7912/josm:

applied #10894 - Show photo direction arrow for thumbnail (patch by holgermappt)

[bastiK]

Thanks, it's great that someone cares for this!