Issue #2282459 by WillowDigit: Make edit section compatible with enforce_revlog.
Issue #2473411 by AaronMcHale: Markup: Use Classes instead of Ids.
Issue #2281961 by WillowDigit: Make edit section compatible with better formats.
Fixed the coding standards.
Issue #1628018 by pifagor:Edit link is visible for those without permission to edit fixed
Issue #2804145 by pifagor:Error saving node bug fixed
Issue #2804133 by pifagor:Error editing bug fixed
Issue #1517324: Undefined offset: 3 in _edit_section_get_offsets - Text format wasn't working correctly - Saving a section was using the wrong value, so the section was getting lost
