Fix switchMoveMode() for point (regarding tool)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@37978 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Show arrows for tools when on a point

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@37979 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
dispose preview when basis is not finished

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@37980 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
preview for pyramid/prism with basis selected

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@37981 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e