Nolan Darilek 5629a006d9 #14011: Implement TreeItem.get_button_tooltip(column, idx).
When added to `TreeItem`, buttons are given tooltips. When returned via `get_button(...)`, however, the button is a `Texture` and the tooltip information isn't included.

For accessibility purposes, it is useful to have access to the tooltip text. As such, we can retrieve a button's tooltip to use as a button label.
2019-09-26 10:41:02 -05:00
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2018-11-20 11:15:02 +01:00
2018-12-27 13:57:08 +01:00