Enabled custom CSS to be applied

Enabled custom CSS to be applied to buttons on the LittleLink page.
CSS that is entered in the database will be applied directly to buttons.
See: https://blog.littlelink-custom.com/upcoming-features/

Author: JulianPrieber

resources/views/littlelink.blade.php

@@ -195,8 +195,10 @@ function get_operating_system() {
          @if($link->button_id === 0)
          <div style="--delay: {{ $initial++ }}s" class="button-entrance"><a class="button button-title button hvr-grow hvr-icon-wobble-vertical" href="{{ route('clickNumber') . '/' . $link->id . '/' . $link->link}}" target="_blank">
          	{{ $link->title }}</a></div>
-         @elseif($link->name === "custom")
+         @elseif($link->name === "custom" and $link->custom_css === "")
          <div style="--delay: {{ $initial++ }}s" class="button-entrance"><a class="button button-{{ $link->name }} button hvr-grow hvr-icon-wobble-vertical" href="{{ route('clickNumber') . '/' . $link->id . '/' . $link->link}}" target="_blank"><img class="icon hvr-icon" src="{{ asset('\/littlelink/icons\/') . $linkName }}.svg">{{ $link->title }}</a></div>
+         @elseif($link->name === "custom" and $link->custom_css != "")
+         <div style="--delay: {{ $initial++ }}s" class="button-entrance"><a class="button button hvr-grow hvr-icon-wobble-vertical" style="{{ $link->custom_css }}" href="{{ route('clickNumber') . '/' . $link->id . '/' . $link->link}}" target="_blank"><img class="icon hvr-icon" src="{{ asset('\/littlelink/icons\/') . $linkName }}.svg">{{ $link->title }}</a></div>
          @elseif($link->name === "buy me a coffee")
          <div style="--delay: {{ $initial++ }}s" class="button-entrance"><a class="button button-coffee button hvr-grow hvr-icon-wobble-vertical" href="{{ route('clickNumber') . '/' . $link->id . '/' . $link->link}}" target="_blank"><img class="icon hvr-icon" src="{{ asset('\/littlelink/icons\/')}}coffee.svg">Buy me a Coffee</a></div>
          @elseif($link->name === "custom_website")