Widget fixes for resizing, TS typings, boolean columns

[sc1f]

• Fix widget resize by calling notifyResize properly
• Fix typing for Perspective Viewer by making table options optional
• Fix exception thrown when string booleans ("True", "False") were passed into Perspective
  • use distutils.util.strtobool to parse truthy/falsy values
• Make sure column pivots on booleans return true or false as their column name, not 0/1

[texodus]

Thanks for the PR! Looks good!