[BUG] Dropdown with popover not scrollable on native

[RasmusKjeldgaard]

• I have written a good issue

Describe the bug

When the list of items within the dropdown should be scrollable, nothing happens if you try to scroll the list on a native device.
NB: this bug does not happen in an emulated device in browsers, only when running on a device.

Describe how to reproduce the bug

1. Create a page like so, preferably scrollable to verify that scroll lock is actually happening:

<kirby-page title="Hello, world. This is Kirby" >
  <kirby-page-content>
    <kirby-dropdown
      [items]="['item 1', 'item 2', 'item 3', 'item 4', 'item 5', 'item 6', 'item 7', 'item 8', 'item 9', 'item 10', 'item 11', 'item 12', 'item 13', 'item 14', 'item 15', 'item 16', 'item 17']"
      [usePopover]="true">
    </kirby-dropdown>
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Pellentesque eget turpis vitae diam tincidunt imperdiet. Sed molestie cursus augue</p>
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Pellentesque eget turpis vitae diam tincidunt imperdiet. Sed molestie cursus augue</p>
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Pellentesque eget turpis vitae diam tincidunt imperdiet. Sed molestie cursus augue</p>
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Pellentesque eget turpis vitae diam tincidunt imperdiet. Sed molestie cursus augue</p>
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Pellentesque eget turpis vitae diam tincidunt imperdiet. Sed molestie cursus augue</p>
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Pellentesque eget turpis vitae diam tincidunt imperdiet. Sed molestie cursus augue</p>
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Pellentesque eget turpis vitae diam tincidunt imperdiet. Sed molestie cursus augue</p>
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Pellentesque eget turpis vitae diam tincidunt imperdiet. Sed molestie cursus augue</p>
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Pellentesque eget turpis vitae diam tincidunt imperdiet. Sed molestie cursus augue</p>
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Pellentesque eget turpis vitae diam tincidunt imperdiet. Sed molestie cursus augue</p>
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Pellentesque eget turpis vitae diam tincidunt imperdiet. Sed molestie cursus augue</p>
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Pellentesque eget turpis vitae diam tincidunt imperdiet. Sed molestie cursus augue</p>
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Pellentesque eget turpis vitae diam tincidunt imperdiet. Sed molestie cursus augue</p>
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Pellentesque eget turpis vitae diam tincidunt imperdiet. Sed molestie cursus augue</p>
  
  </kirby-page-content>
</kirby-page>

2. Try to scroll the dropdown to reveal more items
3. See that it is not possible to scroll

Which Kirby version was used?

5.3.1

What was the expected behavior?

Dropdown should be scrollable, page should still not be scrollable until dropdown closes

Add any screenshots

Please complete the following information:

• OS: Android, iOS

---

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 stable branch following our branch naming convention.

Review

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

• Do a self-review.
• Create a pull-request.