* Consists of .uno:Rect, .uno:LineToolbox, and .uno:ExportDirectToPDF
* Automatically shown when we are in the redaction process
* Customizes the rectangle tool for our needs

Also:
    * Adds new parameters to the SID_DRAW_RECT (.uno:Rect)
      to be able to set transparancy, fill color, and line/border style,
      and to make our button sticky/permanent

Known problem: Button's icon is not shown after adding the parameters

Change-Id: I7928264415769f7e0a4ded171b864adb99aed442
Reviewed-on: https://gerrit.libreoffice.org/66706
Tested-by: Jenkins
Reviewed-by: Muhammet Kara <muhammet.kara@collabora.com>