Show all templates on Publish page as a single sortable table

[tkuhn]

Replaces the topic-grouped All Templates section on the Publish page with a single, sortable table of all templates.

Changes

• TemplateList — the per-tag grouping (DataView<Topic> + ItemListPanel + client-side TemplateData sort) is replaced by one view over the published get-all-templates query, rendered with QueryResultTableBuilder. This reuses the existing all-templates-view (a TabularView), so the renderer now matches the view's declared type. Columns: template (clickable → publish form) · tag · creator · date, each with a sortable header, plus the built-in filter box and pagination. (TemplateList.html simplified to a single all-templates container; the redundant <h3> dropped since the view supplies its title.)
• QueryResultTable — strip a trailing _iri when deriving column headers, so headers read "template"/"user" instead of "template iri"/"user iri". Completes the pattern already applied to _multi/_multi_iri/_multi_val; the full column key is untouched, so the publish-link special-casing, label pairing, and sorting are unaffected.

Notes

• Sorting applies across the full result set (not just the visible page); IRI columns sort on their _label companion (template sorts by name).
• Cosmetic, query-driven leftovers: the header reads "creator" (the query's ?creator/signer), and the date shows as a raw ISO string (sorts chronologically). Prettifying those (author name, formatted date) would require editing + republishing the get-all-templates query.

Verification

• mvn compile clean; wicket:ids match; WicketApplicationTest green. No automated PublishPage render test exists, so the page itself wasn't machine-rendered.

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