Auto-select table record on row actions menu clicked

[Oleg-Melnik]

What

Makes the Table component select the corresponding record when the user
opens a row's actions menu. Previously, clicking the "More" button only opened
the dropdown menu, leaving the selection (and row highlight) on whatever row
was selected before.

Details

• rowActionsColumn and RowActionsButton accept a new
  onRowActionsClicked: (E) -> Unit callback, invoked with the row's entity
  right before the dropdown menu is shown.
• Table.content() passes ::changeSelectedEntity as that callback, so
  invoking the menu reuses the regular row-selection flow: selectedEntity is
  updated, the onSelect callback fires, and the row receives the
  selected-row highlight — exactly as if the row itself was clicked.
• The wiring is internal (private functions); there is no public API change.

Other changes

• Bumped the version to 2.0.0-SNAPSHOT.87 and regenerated pom.xml and
  dependencies.md.