Commit c8cf5f21634a4d1edecf27d0fb876edb0eb5bce1 in isis's branch refs/heads/
ISIS-1603-no-xeditable from Dan Haywood
[ https://git-wip-us.apache.org/repos/asf?p=isis.git;h=c8cf5f2 ]
ISIS-1603: factors out common createSelect2 method for value choices and reference panel, moves up to ScalarPanelAbstract superclass.
Along the way found that ValueChoicesSelect2Panel implements a different interface (ScalarModelWith
Pending), experimented and seems can instead use the model of ReferencePanel (just use the underlying ScalarModel when creating the select2)