do not display message about callibration for high quality WMS

[mkoniecz]

Some WMS are with quality that callibration is not only not necessary but harmful.

For example "Geoportal 2" in Poland.

In this cases message about callibration should not be displayed (or display message that this data source is considered to be perfectly callibrated).

I am currently testing JOSM on clean install to make tutorial for new users, and I would prefer to not include steps like "disregard this warning message".

Repository Root: http://josm.openstreetmap.de/svn
Build-Date: 2014-09-16 01:33:52
Last Changed Author: Don-vip
Revision: 7543
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Relative URL: ^/trunk
URL: http://josm.openstreetmap.de/svn/trunk
Last Changed Date: 2014-09-16 03:29:51 +0200 (Tue, 16 Sep 2014)
Last Changed Rev: 7543

Identification: JOSM/1.5 (7543 pl) Windows 7 64-Bit
Memory Usage: 121 MB / 425 MB (50 MB allocated, but free)
Java version: 1.7.0_51, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Dataset consistency test: No problems found

Plugins:
- OpeningHoursEditor (30609)

Last errors/warnings:
- E: Unable to load layers index for wms cache (file C:\Users\Mateusz\AppData\Roaming\JOSM\cache\wms\layers.properties not found)