Enlarge Traffic date picker tap targets

[guarani]

Fixes #22728

The goal here is to make the buttons in the date picker easier to tap while maintaining the same design and layout.

• The period drop-down was made more easily tappable by increasing its dimensions (via padding) while keeping the visible part (grey oval-shaped button) the same size.
• The arrows were made more easily tappable by increasing their height (via padding)while keeping the arrows themselves the same size.

The date picker should still match the designs, while the invisible touch areas have increased in size.

To test

1. Navigate to the Traffic tab
2. Use the date picker (drop-down and left and right arrows) and verify that they are easier to tap than before.

Regression Notes

1. Potential unintended areas of impact

The Traffic screen's date picker

3. What I did to test those areas of impact (or what existing automated tests I relied on)

Manual testing using the below testing checklist

4. What automated tests I added (or what prevented me from doing so)

This is a layout fix, not suitable for UI tests or unit tests

PR submission checklist:

• I have completed the Regression Notes.
• I have considered adding unit tests for my changes.
• I have considered adding accessibility improvements for my changes.
• I have considered if this change warrants user-facing release notes and have added them to RELEASE-NOTES.txt if necessary.

Testing checklist:

• Portrait and landscape orientations.
• Light and dark modes.
• Fonts: Larger, smaller and bold text.
• High contrast.
• VoiceOver.
• Languages with large words or with letters/accents not frequently used in English.
• Right-to-left languages. (Even if translation isn’t complete, formatting should still respect the right-to-left layout)
• iPhone and iPad.
• Multi-tasking: Split view and Slide over. (iPad)

[dangermattic]

	2 Warnings
⚠️	View files have been modified, but no screenshot or video is included in the pull request. Consider adding some for clarity.
⚠️	This PR is assigned to the milestone 24.4. This milestone is due in less than 4 days. Please make sure to get it merged by then or assign it to a milestone with a later deadline.

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[guarani]

One thing I think is worth noting is that the hit targets that iOS puts on the buttons is larger than the size of the buttons themselves (I'mnot sure how many points it is). Before this change, the button's size (determined by their content) was:

With this PR, they change to:

The period drop-down feels much easier to tap for me. The left and right chevron buttons also do but might have room for improvement. I tried to increase their width, but they shifted too much after removing the padding. I'm keen to hear your thoughts on whether this should be improved.

[staskus]

The period drop-down feels much easier to tap for me.

Agree.

The left and right chevron buttons also do but might have room for improvement. I tried to increase their width, but they shifted too much after removing the padding. I'm keen to hear your thoughts on whether this should be improved.

It does feel better as well, I think the only other improvement would be to increase the chevron size itself. We can wait for feedback about that!