AV size problem in Win8 fixed

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@28249 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Try to fix HD4000

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@28250 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Add display for GL capabilities

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@28251 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Initialize correct size of AV

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@28252 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
[giac] fix for #2481 and other fixes.

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@28253 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e