Add Trianglify background option to the 2.x branch

[ullbergm]

This will give you the option to use Trianglify instead of a background picture for some random background art.

Updated for the 2.x branch.

[ullbergm]

I am not sure why the test is failing, when i run the container everything looks ok.

[KodeStar]

I think you need to update the test as well: https://github.com/linuxserver/Heimdall/blob/2.x/tests/Feature/SettingsTest.php

It's currently expecting to see "Homepage Search" after "Background Image"

[ullbergm]

I tried that but if you look at the output from the test, "Trianglify Random Seed" shows up twice, once under the appearance section and then again after homepage search. But if you look at the screenshot from the webbrowser it only shows up once.
Did i mess something up with the settings id maybe?

[KodeStar]

I think 6 is already in use for the default search provider, use 12 and 13

[ullbergm]

I think 6 is already in use for the default search provider, use 12 and 13

I changed it to 12 and 13 and the test still fails, the weird thing is that even though the text label talks about Trianglify, the link had setting 4 in it:
<a href="http://localhost/settings/edit/4" title="Edit app.settings.trianglify_seed" class="secondary">

[ullbergm]

Figured it out, it was a copy-paste issue on my end.

ps. Glad you added the tests, they caught my mistake.. :)

[keriati]

lgtm

[KodeStar]

@ullbergm we are just 10 days shy of the 5th anniversary of your initial PR, so thanks for persevering so we could finally get it in :D