fix: sidenav filter not working until all additional books are hovered

[icaraps]

• fixes sidenav filter not working until all additional books are hovered
• fixes book title overflowing after filter use

Test URLs:

• Before: https://main--prisma-cloud-docs-website--hlxsites.hlx.page/prisma/prisma-cloud/en/compute/pcee/admin-guide/access-control/rbac
• After: https://delayed-books--prisma-cloud-docs-website--hlxsites.hlx.page/prisma/prisma-cloud/en/compute/pcee/admin-guide/access-control/rbac

[aem-code-sync[bot]]

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[aem-code-sync[bot]]

Page	Scores	Audits	Google
/prisma/prisma-cloud/en/compute/pcee/admin-guide/access-control/rbac

[aem-code-sync[bot]]

Page	Scores	Audits	Google
/prisma/prisma-cloud/en/compute/pcee/admin-guide/access-control/rbac

[icaraps]

loading all books on demand, either on focus or mouseover of the filter input

Sounds good to me I'll update the PR accordingly

[aem-code-sync[bot]]

Page	Scores	Audits	Google
/prisma/prisma-cloud/en/compute/pcee/admin-guide/access-control/rbac