Panning stops at extremities for y-axis in WPF CartesianChart

[ts-research7]

Describe the bug
When interacting with a graph in LiveCharts2, specifically using the CartesianChart class in WPF platform, users experience an issue where vertical panning stops and becomes unresponsive once the graph reaches the smallest or largest y-value. This issue does not affect horizontal panning along the x-axis.

To Reproduce
Steps to reproduce the behavior:

1. Initialize a CartesianChart with a LineSeries that contains multiple data points that allow for vertical and horizontal panning.
2. Pan the graph vertically by dragging it up or down until reaching the limit.
3. Attempt to pan to the opposite direction vertically.
4. See error

Expected behavior
The graph should allow for continuous panning even when reaching the minimum or maximum data points on the y-axis, possibly with an elastic effect or by not locking the vertical panning completely.

Observed Behavior
Panning becomes unresponsive when the smallest or largest y-value is reached. No further vertical movement is possible, trapping the view at the extremity.

Desktop (please complete the following information):

• OS: Windows 11 pro
• Platform: WPF