TMS: TmsServersList.xml server fields move on each exit

[Totor2015]

Tms field order of each server listed in TmsServersList.xml file move on each exit of Merkaartor For example:

1.) <TmsServer name="OSM.org Mapnik" minzoom="0" tilesize="256" maxzoom="17" address="http://tile.openstreetmap.org" path="/%1/%2/%3.png" projection="EPSG:900913"/>
2.) <TmsServer tilesize="256" maxzoom="17" address="http://tile.openstreetmap.org" projection="EPSG:900913" name="OSM.org Mapnik" path="/%1/%2/%3.png" minzoom="0"/>
3.) <TmsServer address="http://tile.openstreetmap.org" minzoom="0" projection="EPSG:900913" name="OSM.org Mapnik" tilesize="256" maxzoom="17" path="/%1/%2/%3.png"/>

I don't think the file should be saved on every exit, even if there is no change. The movement is confusing when trying to add tms servers directly in the file (workaround for bug #88).

Seen on 0.18.2-74-g2bc386b-32bit (win xp 32 ) and 0.18.2-73-g223ee66-64bit.exe (win7 64 ) (tms server is displayed normally as background every time)

[Krakonos]

I'm kicking this can down the road, as it will get major rewrite in the near future and it isn't worth fixing now.