Add hover info to tree nodes #33
Description
It would be good if we could show some data of the note in a small hover window when hovering over the node in the tree view.
In the schema we could add a parameter to the field definition show_on_hover: true/false with default false. Note title should NOT be shown on hover as that's already shown in the tree of course. maybe we could even have an on_hover hook in the schema which returns a calculated block similar to on_view.
managing mouse state is crucial for this: the hover window should not be in the way of left or right clicking the note and the hover action should be suspended during a move/drag operation.
Let's discuss options.