avoid grey rectangle for FormulaText[""], TableText[{}]

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@29898 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Ticket #3785: support for rotated LaTeX (not activated yet, you can substitute rotateDegree 0 with any other degree to test)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@29899 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e