[BugFix] Handle Abusively Large Correlation Matrix.

[deeleeramone]

1. Why?:

   • When a large dataset is supplied to the correlation matrix, the chart does not gracefully handle overload.

2. What?:

   • Enables a hovertemplate that ignores the masked values.
     • Chart can now be read even when impossibly small.
   • Set the colorbar xref to be the container so that it can't overlap with the heatmap.

3. Impact:

   • Improved ability to tolerate large inputs while providing a readable output.

4. Testing Done:

   • Matrix with the Nasdaq 100 constituents.

- Zooming in: