Fix the alignment of the cancel button (public uploads)

[ChrisEdS]

Description

The cancel button was not properly centered.

How Has This Been Tested?

• Manually tested

Screenshots:

Before:

After:

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Database schema changes (next release will require increase of minor version instead of patch)
• Breaking change (fix or feature that would cause existing functionality to change)
• Technical debt
• Tests only (no source changes)

Checklist:

• Code changes
• Unit tests added
• Acceptance tests added
• Documentation ticket raised:
• Changelog item, see TEMPLATE

[codecov]

Codecov Report

Merging #37504 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master   #37504   +/-   ##
=========================================
  Coverage     64.68%   64.68%           
  Complexity    19336    19336           
=========================================
  Files          1278     1278           
  Lines         75562    75562           
  Branches       1331     1331           
=========================================
  Hits          48876    48876           
  Misses        26294    26294           
  Partials        392      392           

Flag	Coverage Δ	Complexity Δ
#javascript	54.14% <ø> (ø)	0.00 <ø> (ø)
#phpunit	65.84% <ø> (ø)	19336.00 <ø> (ø)

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