Dynamic print frame: scale modification

[astrid_emde]

if you change the scale in the textfield 1 is changed to 0 so you can't write maybe 1000 it always ends up to 0000

for more information about the process of the dynamic print have a look at #455

[astrid_emde]

could be the solution: change in plugins/mb_print.php

afterChangeSize : function (obj) {
					if (typeof(obj) == "object") {
						if (obj.scale) {
							jqForm[0].scale.value = obj.scale;
						}
						if (obj.coordinates) {
							jqForm[0].coordinates.value = String(obj.coordinates);
						}
					}
				}

[verenadiewald]

check function for valid scale was called onkeyup, now we use onblur, so the check action does not start while typing, but when input field looses focus

for 2.7: ​http://trac.osgeo.org/mapbender/changeset/7926

for trunk: ​http://trac.osgeo.org/mapbender/changeset/7927