Layout improvement in feedback form page

[saschaszott]

Description

This PR applies some layout improvements to the feedback form page by increasing vertical spacing.

Before

After

[github-actions[bot]]

Hi @saschaszott, Conflicts have been detected against the base branch. Please resolve these conflicts as soon as you can. Thanks!

[tdonohue]

@saschaszott : This has code conflicts. If you wish to have it still considered for 8.0, please get this PR cleaned up and updated to latest main. Otherwise, we'll have to reschedule for 9.0. Thanks!

[saschaszott]

@tdonohue , conflicts were resolved ;)

[tdonohue]

Failing tests here are from an unrelated e2e test.

[dspace-bot]

Backport failed for dspace-7_x, because it was unable to cherry-pick the commit(s).

Please cherry-pick the changes locally and resolve any conflicts.

git fetch origin dspace-7_x
git worktree add -d .worktree/backport-2771-to-dspace-7_x origin/dspace-7_x
cd .worktree/backport-2771-to-dspace-7_x
git switch --create backport-2771-to-dspace-7_x
git cherry-pick -x a238a28376f9e6655dea774175e8ca42db837245