Summary of Changes

As title says

Testing Instructions

Create a smart search module or/and create a smartsearch menu item.
Set Advanced Search parameter to Hide (or, in the module, to Link to Component)

In frontend search for any term.
Look at Console.

Patch, run npm and test again.

Actual result BEFORE applying this Pull Request

Set to Hide

Uncaught TypeError: advanced is null
    onSubmit http://localhost:8888/newfolder/joomla40/media/com_finder/js/finder.js?d95aaed2474d55e8cd9c2b345143f252:54
finder.js:54:9
    onSubmit http://localhost:8888/newfolder/joomla40/media/com_finder/js/finder.js?d95aaed2474d55e8cd9c2b345143f252:54

Set to Link to Component

    Uncaught TypeError: advanced is null
    onSubmit http://localhost:8888/newfolder/joomla40/media/com_finder/js/finder.js?b0b050708b2289022423e09adb1ec45a:54
    onBoot http://localhost:8888/newfolder/joomla40/media/com_finder/js/finder.js?b0b050708b2289022423e09adb1ec45a:77
    onBoot http://localhost:8888/newfolder/joomla40/media/com_finder/js/finder.js?b0b050708b2289022423e09adb1ec45a:76
    EventListener.handleEvent* http://localhost:8888/newfolder/joomla40/media/com_finder/js/finder.js?b0b050708b2289022423e09adb1ec45a:83
    <anonymous> http://localhost:8888/newfolder/joomla40/media/com_finder/js/finder.js?b0b050708b2289022423e09adb1ec45a:84

Expected result AFTER applying this Pull Request

No more Uncaught Error