Matt Smarte

**Problem Description** The `PanTool` sets the window mouse owner to be itself when panning starts (`_start_pan`): https://github.com/enthought/chaco/blob/192675d6cb579df56458b87988026d895e7a7a84/chaco/tools/pan_tool.py#L257-L259 When panning stops (`_end_pan`), it sets the window mouse owner to `None`: https://github.com/enthought/chaco/blob/192675d6cb579df56458b87988026d895e7a7a84/chaco/tools/pan_tool.py#L269-L270...

AbstractPlotRenderers return different array shapes when passing a single point to map_screen

5

`Base2DPlot` and `BaseXYPlot` both implement the `AbstractPlotRenderer` interface, in particular the `map_screen` method. When a single `(x, y)` point is passed to `Base2DPlot.map_screen`, the returned array is of the form...

BUG: `timedelta64` with ns units converts to python `int` rather than a python `timedelta`

5

### Describe the issue: When converting a `timedelta64` with nanosecond units to a python `timedelta` object, the result unexpectedly has the `int` type. With microsecond (or coarser) units the results...