Add inserttag support - "additional URLs"

[derkosmonaut]

It would be great if you could store an insert tag with {{file::xxxx}} in the "Additional URLs" field to better cache assets, for example. Our usecase is the following: we are developing a kind of tour app whose content is provided via a catalog. These are mp3s, images etc. We can automatically generate a file, which summarizes a list of all assets of a starting point. This list could be automatically transferred to the manifest via inserttag.

[coastforge-mei]

Good idea. We'll try to integrate the tag in the next few days.

[coastforge-mei]

With version 2.5.0, insert tags are now possible.