Fix deprecations

[JelteMX]

The following deprecations are reported:

==========================
Login form v3.1.2  //  LoginForm.mpk // LoginForm/widget/LoginForm.js
==========================
Possible violations: 1

Violations:
line:177 // column:43 // deprecation:[ mx.ui.getProgressIndicator ]
{
    "match": "                    this._indicator = mx.ui.getProgressIndicator('modal', this.progresstext);\r",
    "solution": "mx.ui.getProgress"
}

These need to be fixed before the next major MX release