Show a disabled setting->description field on edit

[ikkebra]

The setting->description describes what the setting does, but we are never able to see the full description in the admin panel. We are able to see a truncated description in the index view of the settings i.e. "Email addresses separated by comma, to b[...]" but when we edit that setting, we don't see the description at all. The description provides useful information on what the setting does and should be shown on the edit page as a disabled field, similar to the setting->name. I made it a textarea instead of text in case the description is overly long.

[welcome]

BOOM! Your first PR with us, thank you so much! Someone will take a look at it shortly.

Please keep in mind that:

• if this constitutes a breaking change, it might take quite a while for this to get merged; we try to emulate the Laravel release cycle as much as possible, so developers can upgrade both software once; this means a new big release every ~6 months;
• even if it's a non-breaking change, it might take a few days/weeks for the PR to get merged; unless it's a no-brainer, we like to have some community feedback on new features, before we merge them; this leads to higher-quality code, in the end; we learnt this the hard way :-)
• not all PRs get merged; sometimes we just have to hold out new features, to keep the packages lean; sometimes we don't include features that only apply to niche use cases;
• we're not perfect; if you think we're wrong, call us out on it; but in a kind way :-) we all make mistakes, best we learn from them and build better software together;

Thank you!

--
Justin Case
The Backpack Robot