fdo#80651 replaced oxygen icon and added new tango icon for single page

Change-Id: Idb4113923767e43660a8f99f7b1586bc1cfce3dd
Reviewed-on: https://gerrit.libreoffice.org/12369
Reviewed-by: Samuel Mehrbrodt <s.mehrbrodt@gmail.com>
Tested-by: Samuel Mehrbrodt <s.mehrbrodt@gmail.com>
java: convert fields to local variables where possible

found by PMD

Change-Id: I05b45382b8fb1b734657ce9421a20e6ef6fbe542
Reviewed-on: https://gerrit.libreoffice.org/12376
Tested-by: LibreOffice gerrit bot <gerrit@libreoffice.org>
Reviewed-by: Noel Grandin <noelgrandin@gmail.com>