The table's theme color, for chrome that wears it.
Spread onto the toolbar root: it takes the pointer, and hovering it keeps the toolbar up.
Keep the toolbar up while something it opened has the pointer — its dropdown. Call true when the
dropdown opens and false when it closes.
The hovered table. A press anywhere on the toolbar makes it the current table first, so the table commands act on it.
What the table toolbar is handed.