Mobile event refactoring

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@23700 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Dragging of MathQuill equations works in Mobile (#3062)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@23701 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e