SmartClient 6.5.1 / Firefox 3 - fix for issue with dynamically freezing columns

[Isomorphic]

An issue exists in Firefox version 3 running with the SmartClient 6.5.1 build whereby when dynamically freezing ListGrid columns via the header context-menu options could lead to the ListGrid body becoming wrongly sized.

This is a patch to address that issue:

//----------------------------------------------------------------------------
// Isomorphic SmartClient 6.5.1 patch
// Purpose: Fix for an issue introduced with Firefox version 3.0 whereby dynamically freezing
// a column in the ListGrid would lead to the body being wrongly sized.
// 
// Applies to SmartClient 6.5.1 builds only
//----------------------------------------------------------------------------
if (window.isc && isc.version.startsWith("6.5.1/")) {

if (isc.GridBody) {
    isc.GridBody.addMethods({
    layoutChildren : function (reason,a,b,c) {     
        this.invokeSuper(null, "layoutChildren", reason,a,b,c);
        if (!this.isDrawn() || (this.grid.frozenFields && !this.grid.bodyLayout.isDrawn())) return;
        if (reason == "scrolling state changed") {
            if (this.$28i == null) {
                this.grid.layoutChildren("body scroll changed");
                delete this.$30e;
            } else {
                this.$30e = true;
            }
        }
    }
    });
}
} else if (window.isc) {
  isc.Log.logWarn("Patch for SmartClient 6.5.1 builds included in this application. " +
            "You are currently running SmartClient verion '"+ isc.version + 
            "'. This patch is not compatible with this build and will have no effect. " +
            "It should be removed from your application source.");
}