[giac] Attempt to improve regroup for product and inverses

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@30298 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
REVERT: Attempt to speedup refreshHighlighting (not much related to #3857)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@30299 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Changing giac.js to the latest version in web/kickstart.xml

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@30300 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Fixed size of login dialog

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@30301 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e