More zoom levels when viewing GPX pictures

[naoliv]

When opening a GPX with pictures and clicking at one of them we have only two options: display the picture scaled to the window size or display it at 100% zoom.

Couldn't we have some intermediary zoom levels? Or even make it possible to zoom in/out using the mouse scroll.

JOSM:

URL:http://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2016-04-23 11:25:02 +0200 (Sat, 23 Apr 2016)
Build-Date:2016-04-24 01:33:10
Revision:10154
Relative:URL: ^/trunk

Identification: JOSM/1.5 (10154 pt_BR) Linux Debian GNU/Linux testing (stretch)
Memory Usage: 1318 MB / 9102 MB (605 MB allocated, but free)
Java version: 1.8.0_77-Debian-8u77-b03-3+b1-b1, Oracle Corporation, OpenJDK 64-Bit Server VM
VM arguments: [-Dawt.useSystemAAFontSettings=on]
Dataset consistency test: No problems found

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- DxfImport (1006)
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- PicLayer (31895)
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- buildings_tools (31895)
- conflation (0.1.9)
- contourmerge (1014)
- download_along (31772)
- editgpx (32148)
- ejml (31895)
- geotools (31895)
- imagery_offset_db (32046)
- importvec (31772)
- indoorhelper (32134)
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