Upload enhancements

Created by: ri-pandey

Description

Enhancements to upload process' UI:

• Add checksum computation progress indicator and "checksum evaluation error" alert
• Remove duplicate alert messages
• Animate status icons for various upload statuses
• Fix button alignment on smaller screen sizes

Changes Made

• Feature added
• Bug fixed
• Code refactored
• Tests changed
• Documentation updated
• Other changes: [describe]

Screenshots (if applicable)

Button vertical alignment on smaller screen sizes:

Animated icons:

Checksum computation information

Checklist

• Your code passes linting and coding style checks.
• Documentation has been updated to reflect the changes.
• You have reviewed your own code and resolved any merge conflicts.
• You have requested a review from at least one team member.
• Any relevant issue(s) have been linked to this PR.