_getTotalProgress(value) {
            if(this.removeAfterUpload) return value || 0;

            var notUploaded = this.getNotUploadedItems().length;
            var uploaded = notUploaded ? this.queue.length - notUploaded : this.queue.length;
            var ratio = 100 / this.queue.length;
            var current = (value || 0) * ratio / 100;

            return Math.round(uploaded * ratio + current);
        }
Returns the total progress
@param {Number} [value]
@returns {Number}
@private