Small change to icons

Resize the graphics for Math toolbox to 26x26.
This is the first step to renew all graphics.

git-svn-id: https://svn.apache.org/repos/asf/openoffice/trunk@1862697 13f79535-47bb-0310-9956-ffa450edef68

Added two elements to Math toolbox, cleaned up whitespace

git-svn-id: https://svn.apache.org/repos/asf/openoffice/trunk@1862234 13f79535-47bb-0310-9956-ffa450edef68