Sticky grid on point creation on path or in region

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@38021 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Ticket #4798: some little progress, showing probability calculator view changes its toolbar the first time, the final solution probably comes together from little fixes like this

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@38022 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Ticket #4798: although this change does not help in itself, who knows whether it's part of the solution?

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@38023 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e