The file manager's decoded FCI rows now sit in a fieldset matching the
phone-simulator containers, with the symbolic file name as its legend
(pysimFsInfoHtml(sel, name)); the metadata line stays above the border.
Without a name the fieldset renders without a legend, and without
fci_hex no block is shown at all.
- tests: fieldset/legend markup, metadata line before the border, no
legend without a name, escaped legend text, no fieldset without FCI.
- help EN/RU mention the named FCI block.