Make Gallery compatible with shorter URLs from 9.0

[oparoz]

It seems shorter URLs have been introduced in 9.0, but Gallery doesn't support them.

• Fix page detecting JS in app.php
• Fix Gallery button

[oparoz]

@LukasReschke - Is this a standard feature in 9.0 or is this optional?

[LukasReschke]

@LukasReschke - Is this a standard feature in 9.0 or is this optional?

Enabled if the web server supports it, it should also not really require any work on your side if you have mod_env and mod_rewrite enabled. It should use short URLs then if you use the default IURLGenerator plus the ownCloud core JS functions.

[oparoz]

Thanks! Unfortunately, work is required because we check the URL to only load our JS on the files and files_sharing apps and the regexp contains index.php. I'll remove that and hope URLs don't contain /s/ until files_sharing supports loadAdditionalScripts

[LukasReschke]

Your welcome. Thanks for fixing @oparoz 🚀