TANGO: add new icons for page break, line spacing, comment, and footnote

Change-Id: I222c7df70543de344af73fbc3c8f7e8dae77b196
Reviewed-on: https://gerrit.libreoffice.org/12118
Reviewed-by: Matthew Francis <mjay.francis@gmail.com>
Tested-by: Matthew Francis <mjay.francis@gmail.com>