Set padding-top: 15px for popup card.

[naogify]

Close #338

When I set a popup on a marker and click on it, the focus is on the close button (x) and part of the text in the popup is hidden. This happens only when you click on the marker for the first time.

So, I changed the padding-top of the popup from 10px to 15px.

Before

After

Changelog

<changelog>Fix padding-top of the popup to improve readability of popup text (#354).</changelog>

Launch Checklist

• confirm your changes do not include backports from Mapbox projects (unless with compliant license) - if you are not sure about this, please ask!
• briefly describe the changes in this PR
• include before/after visuals or gifs if this PR includes visual changes
• write tests for all new functionality
• document any changes to public APIs
• post benchmark scores
• manually test the debug page
• apply changelog label ('bug', 'feature', 'docs', etc) or use the label 'skip changelog'
• add an entry inside this element for inclusion in the maplibre-gl-js changelog: <changelog></changelog>

[HarelM]

Thanks!

[HarelM]

Forgot to ask: Please add this to the change log file.

[github-actions]

Bundle size report:

Size Change: -1 B
Total Size Before: 194 kB
Total Size After: 194 kB

Output file	Before	After	Change
maplibre-gl.js	185 kB	185 kB	0 B
maplibre-gl.css	9.49 kB	9.49 kB	-1 B

ℹ️ View Details

No major changes

[naogify]

@HarelM
I have added the changes to the change log. If you have something to fix, let me know!