[BUGFIX] Fluid fallback-paths also for emails

The Standalone-view used for creating email-bodies does not
support multiple paths. This is added with an extended class.

Restructure functionality for fetching paths.

Change-Id: I9e60ca4ceb2bb0683417d66f4ec74bc3573204a8
Resolves: #61551
[BUGFIX] Fluid fallback-paths also for emails

The Standalone-view used for creating email-bodies does not
support multiple paths. This is added with an extended class.

Restructure functionality for fetching paths.

Change-Id: I9e60ca4ceb2bb0683417d66f4ec74bc3573204a8
Resolves: #61551