Returning from CardDAV collection view via arrow opens CalDAV tab

[sunkup]

Problem scope

• I'm sure that this is a DAVx⁵ problem.

App version

• I'm using the latest available DAVx⁵ version.

Android version and device/firmware type

N/A

Steps to reproduce

1. Add account with CalDAV and CardDAV
2. Switcht to CardDAV tab
3. Tap any collection to see it's details
4. Tap the return arrow (normal return action works fine)

Actual result

You are presented with the CalDAV tab open.

Expected result

It should be the CardDAV tab when returning from a CardDAV collection

Further info

Normal back action works as expected

[rfc2822]

Should be addressed in #902.