=== TC 1 ===
 1. Set caret in highlihted position in table caption.
 1. Press Enter
  * Caption now is divided into two lines
 1. Switch into Source mode
  * Caption should be {{{ Table
 Caption }}}
 1. Switch back into WYSIWYG
 1. Right-click on table, and select "table properties"
  * In dialog window, Table size and Caption options should be blocked for editing.