Fix missing padding in the poll editor

[benitoalba]

Fixes #119

Changes proposed in this Pull Request

The legacy poll editor inherited the full-bleed margins used by the Crowdsignal dashboard, causing the form to touch both edges of wp-admin. The Save panel also used a class instead of the standard minor-publishing ID, so its controls had no inner spacing.

This change:

• applies normal wp-admin gutters only to create and edit poll screens
• restores 10px padding to the Save panel
• leaves the full-bleed layout unchanged for other Crowdsignal pages

Testing instructions

1. Connect a Crowdsignal account and open Crowdsignal > Polls.
2. Create or edit a poll.
3. Confirm the editor has normal left and right gutters.
4. Confirm the Save options have inner padding.
5. Confirm non-editor Crowdsignal screens retain their existing full-bleed layout.

Validated locally on WordPress 7.0.1:

• PHP syntax checks pass for both changed PHP files.
• Unit suite passes (2 tests, 2 assertions).
• git diff --check passes.
• Edit, create, preview, and narrow viewport layouts were visually checked.
• The integration suite could not start because offline wp-env did not populate /wordpress-phpunit; bootstrap failed before tests ran.
• Repository-wide PHPCS reports existing legacy violations; a filtered report found no violations on the new lines.

Screenshot or video

Before:

After:

Proposed changelog entry for your changes

Fix missing padding in the Crowdsignal poll editor.

Release Notes

• Fix missing padding in the Crowdsignal poll editor.