Empty tabs: generateSimpleTabsAndContent gated tabs on a hasFields heuristic
that drifted from what generateConfigFields actually emits, so a category like
Network could show a tab whose body only read "No configuration options
available". Render each category's fields first and emit the tab only when the
output is non-empty, keeping tabs and content in lockstep.
Rename: the backup_advanced subcategory now displays as "Engine" via a
display-name override in formatSubcategoryName. File and CFG_BACKUP_* keys are
unchanged, so saved values are unaffected.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Signed-off-by: librelad <librelad@digitalangels.vip>