PHP Deprecation Warnings on null's used in @includeIf

[spekkie2002]

Hi Guys,

I'm quite new to livewire-powergrid. First of all: good job guys!
As it is not really a bug, i don't know if i should open an issue for it, and besides that, because i'm new to powergrid, i don't feel confident enough to open a PR myself.

The problem

When you don't supply a Footer in the setUp() array, PHP throws out a few exceptions to the deprectations log.
First of all, the deprecations channel is not set up by default, so the normal logs get quite a few extra's in it :-)

Some details

php-deprecation-warnings.log shows two lines when the footer is removed from setUp():
[2022-07-18 00:00:00] local.WARNING: trim(): Passing null to parameter #1 ($string) of type string is deprecated in <path>/vendor/laravel/framework/src/Illuminate/View/FileViewFinder.php on line 75

When digging in to it, i found it's because, for example, in footer.blade.php the @includeIf is supplied with a null because it is not set in

Sugested fix

Use @includeWhen() instead of @includeIf() (docs)

Let me know if i should do something :-)

Thanks!