Restricted editing - Standard mode

• The editor data should be loaded with "it is editable" fragment marked as an exception in the first paragraph (orange-ish background).
• Test the "Restricted editing" button to mark parts of text as non-restricted.

Restricted editing - Restricted mode

• The editor data should be loaded with the same exception fragments as defined in standard mode.
• The editor toolbar should have limited set of buttons for basic styles.
• The following table features should be enabled (via restrictedEditingModeEditing.enableCommand()):
  • 'insertTableRowAbove'
  • 'insertTableRowBelow'
  • 'insertTableColumnRight'
  • 'insertTableColumnLeft'
  • 'mergeTableCells'