Castle.cms

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- try/catch in upgrade step

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- Adjust View Page actions to account for folder's default page view
- Rework templates to be anything in the Template Repository (remove ITemplate)
- Better display of templates and icons in add content modal

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- Create Content Redirectable behavior so Dexterity objects can act as redirects
- Create an action to convert pages into folders with the original page as the default view

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- Fix upgrade step 3006 (change incorrect prefix)
- Fix upgrade step 3008 (simplify and remove unnecessary registry records)
- Remove unnecessary profile 3008

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- Update control panel icons, providing one for every castle configlet
- Update dexterity types so every one has an icon and a short desription
- Add EmailTemplate dexterity type for repeated emails
- Fix data-tiles that don't exist from rendering and spamming output
(for dexterity type definitions in control panel in /dexterity-types/<DexterityTypeHere>)
- Allow resuming importjson script
- fix missing/ inconsistently localed back to site setup button in controlpanels

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- Allow users to request site access on login screen