Improvements to Speaker Management

[ajtruckle]

Is your feature request related to a problem? Please describe. Public Talks has a feature that allows you to update each speakers chosen talks via an edit control:

Describe the solution you'd like Add a similar feature be added to Meeting Schedule Assistant speaker window:

The button would be renamed to Update List.

Additional context This would let the user have the option of updating the list of talks via the edit control or pasting in bulk.

[ajtruckle]

I have migrated the code from Public Talks and adapted to Meeting Schedule Assistant: