Add conditions to more extension manifests

[jemayn]

I've had a few extensions now where I wanted to add a condition to them only to find that their manifests do not support conditions.

I find it hard to understand why they are not just a standard thing in the UmbExtensionManifest?

I don't have a full overview of the extensions that have and do not have condtions enabled, but I specifically have wanted to use them on these:

ManifestBackofficeEntryPoint - I could understand why this was omitted, but it could be very useful for these to be able to do something based on for example usergroups.

ManifestPropertyValuePreset - this just seems like a no-brainer, being able to limit this to specific doctypes is a very common usecase - especially with this being a replacement for SendingContentNotifications in v13 where that was the norm.

[netaddicts]

Agreed, being able to specify a default value for document types (not having to rely on blueprint) and for specific properties (alias) on the document type would be welcome, it would indeed support a lot of use cases out there