fixed merge function to work with getter/setter props

[p3root]

The current version of the merge function does not determine getter/setter properties. Therefore I check if the given property is not void 0 to check if the obj2 has a field with that given name. The name/functionality for the .hasOwnProperty function sucks in this case.

[tomazk8]

In the latest 12.1.0 version the problem is still present. The fix doesn't work because because merge uses for (const p in obj2) which doesn't list the properties with getter and setter.

[tomazk8]

I temporary modified the merge method like this and it works now:

static merge(obj1, obj2, properties) {
    /*for (const p in obj2) {
        if (obj2[p] !== void 0 && properties.hasOwnProperty(p)) {
            if (typeof obj2[p] === 'object') {
                obj1[p] = GridsterUtils.merge(obj1[p], obj2[p], properties[p]);
            }
            else {
                obj1[p] = obj2[p];
            }
        }
    }*/

    Object.keys(properties).forEach(p => {
        if (typeof obj2[p] === 'object') {
            obj1[p] = GridsterUtils.merge(obj1[p], obj2[p], properties[p]);
        }
        else {
            if (!!obj2[p])
                obj1[p] = obj2[p];
        }
    });
    return obj1;
}

Note that I am mainly not a web or angular developer so my solution may be wrong. Please give me some feedback.