setIndicator(n) {
			if (n > 0) {
				UI.prototype.showIndicator('uci-changes',
					'%s: %d'.format(_('Unsaved Changes'), n),
					L.bind(this.displayChanges, this));
			}
			else {
				UI.prototype.hideIndicator('uci-changes');
			}
		}
Set the change count indicator.

This function updates or hides the UCI change count indicator,
depending on the passed change count. When the count is greater
than 0, the change indicator is displayed or updated, otherwise it
is removed.

@instance
@memberof LuCI.ui.changes
@param {number} n
The number of changes to indicate.