fix: allow draggable modal to work with inline left style #1056

[fluxaro]

What this PR does

This fixes the issue where draggable modals stop working when an inline left: 0 style is applied (Issue #1056).

How it was fixed

• Updated the draggable logic to correctly calculate offsets even when left is set inline.
• Ensures the modal can still be dragged as expected.
• Preserves all existing modal functionality.

Testing

• Verified dragging works with left: 0.
• Verified dragging still works with other left values.
• Checked that no other modal styles are broken.