Added a reset button to the PDF toolbar in `EnvelopeViewer.razor`
to allow users to reset all signatures and state. The button is
conditionally displayed when there are signed signatures
(`_signedSignatures > 0`).
Implemented the `RestartSigning` method to reload the page and
reset all signatures by navigating to the current URI with
`forceLoad: true`.
Introduced new styles in `envelope-viewer.css` for the reset
button, including hover effects, background gradients, border
colors, and transitions for a polished user experience.
Updated the reset button to include an SVG icon with hover
effects for better visual feedback and consistency with the
application's design.
TekH
de60bd239d