display.pvtable: Fix tool tip of last row
display.pvtable: Support VEnumArray display/save/restore/editing

.. is edited by index, though. No per-element label drop-down.
display.pvtable: Show no value for last, new-PV-entry row
vtype.pv: Fix initial read-only info for CA PV
vtype.pv: Increment version
display.pvtable: Increment version
display.pvtable: Update tests
display.pvtable: Reduce time when changed_items is locked
display.pvtable: Add preference 'treat_byte_array_as_string'
display.pvtable: 'Selected' column info wasn't saved to *.pvs file

.. and 'dirty' state of editor now also updates when (de-)selecting
rows.
display.pvtable: Support 'dropping' more than one PV

Used to be dropped as one String 'PV[name1, name2, ..]'