[BUG] Dropdown doesn't show items when used within Page

[X] I have written a good issue

Describe the bug

When using the dropdown configured with expand="block" [usePopover]="true" within a kirby-page the card popover doesn't show when opening the dropdown.

Describe how to reproduce the bug

Nest a kirby-dropdown within a kirby-page and configure it with expand="block" [usePopover]="true"
Click on the dropdown to toggle/open it
See the items not being shown

Which Kirby version was used?

9.3.2

What was the expected behavior?

The items being shown.

Are there any additional context?

Seems to be caused by the dropdown's ngAfterViewInit being run before the dropdown has a width, which is where the width of the card/popover is set when configured with popover+block. This is again caused by the ion-content element within kirby-page not having a width until it has been initialized.

Checklist:

The following tasks should be carried out in sequence in order to follow the process of contributing correctly.

Verification

To make sure the bug is not intended behaviour; it should be verified by a member of team Kirby before moving on to implementation.

[ ] Make sure the NOT verified label has been removed by a member of team Kirby; do not proceed until this is done.

Implementation

The contributor who wants to implement this issue should:

[ ] Make sure you have read: "Before you get coding".
[ ] Signal to others you are working on the issue by assigning yourself.
[ ] Create a branch from the develop branch following our branch naming convention.
[ ] Create a test that reproduces the bug following guidelines in: "The good: Test".
[ ] Write code to fix the bug

Review

Once the issue has been implemented and is ready for review:

[ ] Do a self-review.
[ ] Create a pull-request.

kirbydesign / designsystem