(fix) O3-4341: Fix modal close buttons placement in the lab app

[Muppasanipraneeth]

Requirements

• This PR has a title that briefly describes the work done including the ticket number. If there is a ticket, make sure your PR title includes a conventional commit label. See existing PR titles for inspiration.
• My work conforms to the OpenMRS 3.0 Styleguide and design documentation.
• My work includes tests or is validated by existing tests.

Summary

while clicking the pick lab request in the laboratory app and reject lab request
modal pop for that close icon is not aligned correctly
[close modal css is not aligned correctly ]

Screenshots

Before

After

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[Muppasanipraneeth]

@denniskigen

[denniskigen]

LGTM. Thanks, @Muppasanipraneeth!

[Muppasanipraneeth]

thanks @denniskigen 😊