Preview fixes

[tompipe]

added a condition to only render a preview if the request came from the content section, and there is content in the cache.

Partially addresses https://github.com/umco/umbraco-doc-type-grid-editor/issues/53

[leekelleher]

@tompipe I meant to ask you about this one after UK Festival... you've added a check to make sure the preview only renders in the "content" section, but where else would it attempt to render the preview?

Is this something you've experienced? As I'm not sure where I'd test for this issue.

[tompipe]

Hi Lee,

Yes, it tries to render in settings section, when creating/updating a doctype.

It causes all sorts of craziness detailed in #53 :D

[leekelleher]

Hmmm I'm confused, the property-editor preview wouldn't have any content in the doctype editor, right?

[tompipe]

No, but when there is no content at all in the site, something under the hood causes a redirect to the welcome screen, which causes it to render in the doctype editor.

[leekelleher]

Ahhh ok gotcha... I'll give it a test 👍

I'm looking into the previewer mechanism at the moment (re: #59)

[leekelleher]

Closing this pull request, (sorry @tompipe - I know it's been lingering for 18 months or so).
PR #105 replaces the existing previewer mechanism.