fix a bunch of null safety issues, and other problems with sort -
including artf231362
fix for loosing validator data values when going back a page on the
wizard.  artf231367
add the ability to add a menu to the context menu
refactor ConfigureDynamicRefexView for reuse
Utility code for getting reindex events
bring up the index config menu directly from the sememe dialog in search
view.  Tie in index event listeners, so that the GUI updates when the
index configuration changes.  artf231373