Closes WOOMOB-1831

Description

After the changes in the booking list layout introduced in #16327, the pull-to-refresh feature stopped working when the search bar is in focused.

This PR fixes the issue by updating the layout of the booking list when search is active. The fix is to apply a simple VStack layout to place the header on top instead of keeping it as a section header. The section header implementation is only necessary as a workaround for refreshable to work with the navigation bar containing large title.

Test Steps

• Log in to a CIAB store with existing bookings.
• Navigate to Bookings tab
• Confirm that pull-to-refresh works with both empty state and list view when search is not active.
• Tap the search icon and type any keyword.
• Confirm that pull-to-refresh works with both empty state and list view when search is active.

Screenshots

Before:

After:

• I have considered if this change warrants user-facing release notes and have added them to RELEASE-NOTES.txt if necessary.