Allowed \n and \t to lead into the pre-filter shortcut.
Removed 'm' regexp flag from match in _list/tabulate.

The reason would be that the autocomplete source array gives multi-line
suggestions and these wouldn't match the string in the list function.
Simplified variable regexp indicators.
Fixed bad multi-line string match.

- Escaped control characters 'tnrfbu' in the autocomplete source array value,
  and in update_geometry.create_filter(),
- Parsed control characters for pre-filter to _view/field-type-value with keys.
Cleared [name=content] on user-initiated [name=field] change().

That way it won't be cleared if the type selection changes.
Routed queries to _view/field-type-value.
Removed unused _view/fields-values.
Rewrote aquisition of basename and extension.
Simplified keyword accumulation in _list/tabulate.
Added JSON bools and numbers to direct field look-up.
Removed !new_filter.redo contingency and increased doc count.