Allow properties for button (NPE on properties update)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@33520 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Object properties for Input Boxes work now

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@33521 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Do not show Button size for Input Boxes [needs backport]

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@33522 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Input box refactoring

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@33523 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e