[BUG] Conditionally rendered text in kirby-button is broken

Describe the bug

Conditional rendering text ('render text' vs ' not rendering any text') alongside an icon inside kirby-button "breaks" the button. When I say it "breaks", I mean the kirby-button still behaves/'is styled' as though there is text inside the button when the conditional rendering defaults to not render any text.

Describe how to reproduce the bug

Add kirby-button to a button html tag.
Inside the button, add some conditional logic that switches between rendering text and not rendering any text
Add an icon inside the button

Examples:

            <button
              kirby-button
            >
              <kirby-icon name="cog"></kirby-icon>
              {{
                showEditOveriewLabelText$() ? "Rediger overblik" : ""
              }}
            </button>

           <button
              kirby-button
            >
              <kirby-icon name="cog"></kirby-icon>
              @if (showEditOveriewLabelText$()) {
                   "some-text"
              }
            </button>

Which Kirby version was used?

"@kirbydesign/designsystem": "9.2.1",

What was the expected behavior?

This is how it currently behaves when the conditional logic renders an empty string:

This is how it should behave:

Add any screenshots

Please complete the following information:

OS: [e.g. Windows, MacOS, iOS]
Browser [e.g. Chrome, Safari]
Browser version [e.g. 22]

Are there any additional context?

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