[FIXED][3.0] TriggerField / r2213 and IE8

[stever]

Jack put in r2213 before IE8 was out to deal with some IE problems apparently. However, in IE8 it messes up twin trigger fields that I have created. Perhaps it should be limited to IE6 and IE7. Which works for me. Thanks!

    afterRender : function(){
        Ext.form.TriggerField.superclass.afterRender.call(this);
        var y;
        if((Ext.isIE6||Ext.isIE7) && !this.hideTrigger && this.el.getY() != (y = this.trigger.getY())){
            this.el.position();
            this.el.setY(y);
        }
    }

In addition: the CSS fixes for the ie bogus margin bug should be restricted to IE6 and IE7 in form.css:

.ext-ie6 .x-small-editor .x-form-text,.ext-ie7 .x-small-editor .x-form-text {
    margin-top:-1px !important; /* ie bogus margin bug */
    margin-bottom:-1px !important;
    height:20px !important; /* ie quirks */
    line-height:16px !important;
}

.ext-ie6 .x-form-text,.ext-ie7 .x-form-text {
    margin:-1px 0; /* ie bogus margin bug */
    height:22px; /* ie quirks */
    line-height:18px;
}

.ext-ie6 textarea.x-form-field,.ext-ie7 textarea.x-form-field {
    margin:-1px 0; /* ie bogus margin bug */
}