JOSM reloads multiple times a local style/validation file

[naoliv]

When JOSM detects that a local style/validation file was modified it seems to reload it multiple times (instead only once).

For example, after saving a local validation rule I see:

017-09-10 02:01:11.968 INFO: Validator rule Brasil has been modified. Reloading rule...
2017-09-10 02:01:11.990 INFO: Validator rule Brasil has been modified. Reloading rule...
2017-09-10 02:01:12.022 INFO: Validator rule Brasil has been modified. Reloading rule...

And after saving a local style file:

2017-09-10 02:04:51.867 INFO: Map style Distritos has been modified. Reloading style...
2017-09-10 02:04:51.883 INFO: Map style Distritos has been modified. Reloading style...

JOSM:

Revision:12808
Is-Local-Build:true
Build-Date:2017-09-09 15:43:54

Identification: JOSM/1.5 (12808 SVN pt_BR) Linux Debian GNU/Linux unstable (sid)
Memory Usage: 684 MB / 3072 MB (214 MB allocated, but free)
Java version: 9-Debian+0-9b181-4, Oracle Corporation, OpenJDK 64-Bit Server VM
Screen: :0.0 1920x1080
Maximum Screen Size: 1920x1080
Java package: openjdk-9-jre:amd64-9~b181-4
Java ATK Wrapper package: libatk-wrapper-java:all-0.33.3-13
VM arguments: [--add-modules=java.se.ee, -Dawt.useSystemAAFontSettings=on]

[Don-vip]

In 12814/josm:

fix #15282 - JOSM reloads multiple times a local style/validation file